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Ancient genome from Africa sequenced for the first time

University of Cambridge—The first ancient human genome from Africa to be sequenced has revealed that a wave of migration back into Africa from Western Eurasia around 3,000 years ago was up to twice as significant as previously thought, and affected the genetic make-up of populations across the entire African continent.

The genome was taken from the skull of a man buried face-down 4,500 years ago in a cave called Mota in the highlands of Ethiopia – a cave cool and dry enough to preserve his DNA for thousands of years. Previously, ancient genome analysis has been limited to samples from northern and arctic regions.

The latest study is the first time an ancient human genome has been recovered and sequenced from Africa, the source of all human genetic diversity. The findings are published today in the journal Science.

The ancient genome predates a mysterious migratory event which occurred roughly 3,000 years ago, known as the ‘Eurasian backflow’, when people from regions of Western Eurasia such as the Near East and Anatolia suddenly flooded back into the Horn of Africa.

The ancient genome enabled researchers to run a millennia-spanning genetic comparison and determine that these Western Eurasians were closely related to the Early Neolithic farmers who had brought agriculture to Europe 4,000 years earlier.

By comparing the ancient genome to DNA from modern Africans, the team has been able to show that not only do East African populations today have as much as 25% Eurasian ancestry from this event, but that African populations in all corners of the continent – from the far West to the South – have at least 5% of their genome traceable to the Eurasian migration.

Researchers describe the findings as evidence that the ‘backflow’ event was of far greater size and influence than previously thought. The massive wave of migration was perhaps equivalent to over a quarter of the then population of the Horn of Africa, which hit the area and then dispersed genetically across the whole continent.

“Roughly speaking, the wave of West Eurasian migration back into the Horn of Africa could have been as much as 30% of the population that already lived there – and that, to me, is mind-blowing. The question is: what got them moving all of a sudden?” said Dr Andrea Manica, senior author of the study from the University of Cambridge’s Department of Zoology.

Previous work on ancient genetics in Africa had involved trying to work back through the genomes of current populations, attempting to eliminate modern influences. “With an ancient genome, we have a direct window into the distant past. One genome from one individual can provide a picture of an entire population,” said Manica.

The cause of the West Eurasian migration back into Africa is currently a mystery, with no obvious climatic reasons. Archaeological evidence does, however, show the migration coincided with the arrival of Near Eastern crops into East Africa such as wheat and barley, suggesting the migrants helped develop new forms of agriculture in the region.

The researchers say it’s clear that the Eurasian migrants were direct descendants of, or a very close population to, the Neolithic farmers that brought agriculture from the Near East into West Eurasia around 7,000 years ago, and then migrated into the Horn of Africa some 4,000 years later. “It’s quite remarkable that genetically-speaking this is the same population that left the Near East several millennia previously,” said Eppie Jones, a geneticist at Trinity College Dublin who led the laboratory work to sequence the genome.

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 Above and below: Mota cave, where the burial was located. Credit Kathryn and John Arthur

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Archaeologists outside the entrance to the Mota cave, where the remains containing the ancient genome were found. Credit Kathryn and John Arthur

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 Inside Mota cave – excavation of the rock cairn under which the burial was found. Cedit Kathryn and John Arthur

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While the genetic make-up of the Near East has changed completely over the last few thousand years, the closest modern equivalents to these Neolithic migrants are Sardinians, probably because Sardinia is an isolated island, says Jones. “The famers found their way to Sardinia and created a bit of a time capsule. Sardinian ancestry is closest to the ancient Near East.”

“Genomes from this migration seeped right across the continent, way beyond East Africa, from the Yoruba on the western coast to the Mbuti in the heart of the Congo – who show as much as 7% and 6% of their genomes respectively to be West Eurasian,” said Marcos Gallego Llorente, first author of the study, also from Cambridge’s Zoology Department.

“Africa is a total melting pot. We know that the last 3,000 years saw a complete scrambling of population genetics in Africa. So being able to get a snapshot from before these migration events occurred is a big step,” Gallego Llorente said.

The ancient Mota genome allows researchers to jump to before another major African migration: the Bantu expansion, when speakers of an early Bantu language flowed out of West Africa and into central and southern areas around 3,000 years ago. Manica says the Bantu expansion may well have helped carry the Eurasian genomes to the continent’s furthest corners.

The researchers also identified genetic adaptations for living at altitude, and a lack of genes for lactose tolerance – all genetic traits shared by the current populations of the Ethiopian highlands. In fact, the researchers found that modern inhabitants of the area highlands are direct descendants of the Mota man.

Finding high-quality ancient DNA involves a lot of luck, says Dr Ron Pinhasi, co-senior author from University College Dublin. “It’s hard to get your hands on remains that have been suitably preserved. The denser the bone, the more likely you are to find DNA that’s been protected from degradation, so teeth are often used, but we found an even better bone – the petrous.” The petrous bone is a thick part of the temporal bone at the base of the skull, just behind the ear.

“The sequencing of ancient genomes is still so new, and it’s changing the way we reconstruct human origins,” added Manica. “These new techniques will keep evolving, enabling us to gain an ever-clearer understanding of who our earliest ancestors were.”

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The study was conducted by an international team of researchers, with permission from the Ethiopia’s Ministry of Culture and Authority for Research and Conservation of Cultural Heritage.

Source: Subject press release of the University of Cambridge

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This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  

 

 

 

 

 

Human Ancestor Candidate Sported Hands and Feet Much Like Modern Humans

After extensive study of the hand and foot fossils of the newly discovered species H. naledi, 1550 fossil elements of which were recovered in 2013 in the Rising Star cave system in the Cradle of Humankind World Heritage region of South Africa, scientists are suggesting that this hominin may have been uniquely adapted for both tree climbing and walking as dominant forms of movement, while also being capable of precise manual manipulation.

The research was conducted by a team of international scientists associated with the Evolutionary Studies Institute at the University of the Witwatersrand in South Africa, home of the Rising Star Expedition team that discovered the largest hominin find yet made on the African continent.

According to the researchers, when considered together, these papers, published in the journal Nature and entitled The foot of Homo naledi and The hand of Homo naledi, relate a decoupling of the upper and lower limb function in H. naledi, and provide an important insight into the skeletal form and function that may have characterized early members of the Homo genus.

The foot of Homo naledi

Lead author William Harcourt-Smith and colleagues describe the H. naledi foot based on 107 foot elements from the Dinaledi Chamber, including a well preserved adult right foot. The 107 elements also included assorted parts provisionally assigned to two other adults and a juvenile. They show the H. naledi foot shares many features with a modern human foot, indicating it was well-adapted for standing and walking on two feet. However, the authors note it differs in having more curved toe bones (proximal phalanges), indicating a significant tree-climbing capacity, a characteristic more associated with more ‘primitive’ homins and other primates.

“It was a striding long-distance traveler with an arched foot and a non-grasping big toe with subtle differences from humans today in having somewhat more curved toes and a reduced arch,” said lead study author Jeremy DeSilva of Dartmouth College. “It looks like what the foot of Homo erectus might look like. H. erectus is the earliest human with body proportions similar to our own, with long legs, short arms. It might be closely related to H. erectus, but the brain is smaller and it has a Lucy-like shoulder with curved fingers. This is a new combination that we haven’t seen before.”

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The Homo naledi hand and foot were uniquely adapted for both tree climbing and walking upright. Credit Peter Schmid and William Harcourt-Smith | Wits University

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The hand of Homo naledi

Another lead author, Tracy Kivell of the University of Kent and colleagues, describe the H. naledi hand based on nearly 150 hand bones from the Dinaledi Chamber, including a nearly complete adult right hand (missing only one wrist bone) of a single individual, which is a rare find in the human fossil record.

The H. naledi hand reveals a unique combination of anatomy that has not been found in any other fossil human before. The wrist bones and thumb show anatomical features that are shared with Neanderthals and modern humans and suggest powerful grasping and the ability to use stone tools.

However, the finger bones are more curved than most early fossil human species, such as Lucy’s species Australopithecus afarensis, suggesting that H. naledi still used their hands for climbing in the trees. This mix of human-like features in combination with more primitive features demonstrates that the H. naledi hand was both specialized for possible complex tool-use activities, as well as for climbing locomotion.

“The tool-using features of the H. naledi hand in combination with its small brain size has interesting implications for what cognitive requirements might be needed to make and use tools, and, depending on the age of these fossils, who might have made the stone tools that we find in South Africa,” says Kivell.

DeSilva says that throughout Africa there were probably a variety of hominin-like creatures living in microhabitats, evolving different kinds of adaptations to survive in their environments. “Humans are like every other animal on the planet. Our evolutionary history is mixed.”

“It’s a mosaic, lots of different experiments,” he continued, “and we just happen to be the only one left, for whatever reason.”

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Source: Edited and adapted from the subject releases of the University of the Witwatersrand and Dartmouth College.

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Did you like this?  See the latest, in-depth feature article about the Homo naledi discovery in Popular Archaeology.

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This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  

 

 

 

 

 

Petroglyph in Spain Marks when Atlantic and Mediterranean Cultures Met

A unique petroglyph discovered near the Atlantic coast of northern Spain has provided evidence that contacts between ancient Atlantic cultures and contemporaneous cultures of the Mediterranean were earlier and perhaps more intense than previously thought. 

The rock art panel, located in the Costa dos Castros region and known as Auga dos Cebros, depicts a boat with a structure, including a combination of oars and sails, that match the general design and concept of seafaring vessels of Mediterranean cultures roughly 4,000 years ago. The typical Atlantic equivalent boats of the time were known to feature primarily oar-propelled boats without sails, with a different overall form.

When first encountered, the petroglyph piqued the interest of researcher Javier Costas Goberna, who first began searching for comparable evidence and renderings in the archaeological record throughout Europe. Coming up empty, he turned his attention to researching the Mediterranean regions. His search here proved fruitful, discovering evidence of very similarly designed vessels as evidenced by a variety of archaeological finds. In fact, fellow researcher María Ruiz-Gálvez Priego identified the Auga dos Cebros boat as being remarkably similar to Aegean model vessels of approximately 2000 B.C., particularly as they were depicted on ancient Cretan stamps. Like the Auga dos Cebros boat, those vessels featured outwardly-opened bows and sterns, masts and rigging that held sails as the primary means of propulsion, and lines that are interpreted to represent oars and/or oarsmen for secondary, additional propulsion. 

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 Above: A graphic representation of the Auga dos Cebros petroglyph, showing the obvious boat feature at the bottom. This image is a screenshot of the same as depicted in the YouTube video (see below). 

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Combined with the fact that the Auga dos Cebros petroglyph represents the only such depiction of this type of seafaring vessel in the Atlantic/European region characteristic to the Bronze Age time period, the researchers posit that the Auga dos Cebros boat likely traveled from a Mediterranean point of origin, suggesting contact or trade with Atlantic cultures as much as 4,000 years ago. 

More about this important discovery, including images, can be found in the Dig Ventures article by Maiya Pina-Dacier.

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summer2015ebookcover3

This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  

 

 

 

 

 

The Iceman Cameth

Patrick D Hahn is an Affiliate Professor of Biology at Loyola University Maryland and a free-lance writer. His writing has also appeared in Biology-Online, Loyola Magazine, Natural News, the Canada Free Pressand the Baltimore Sun.

In his laboratory at the Smithsonian’s Museum of Natural History in Washington, D.C., Dr. Dennis Stanford hands me a slab of brown plaster. It’s a replica of a bone fragment – from a mastodon or a giant ground sloth – recovered from Vero Beach, Florida. On the slab is an etching of a mastodon, placed there by some unknown artist. The bone has become mineralized, making radiocarbon dating impossible, but we do know that the last mastodons disappeared from eastern North America some 12-13,000 years ago, making the etching at least that old. It could be much older than that, which would make this artifact part of a growing body of evidence that could overturn everything scientists once thought they knew about the peopling of the Americas.

At seventy-two, Dr. Stanford still is a redoubtable figure: bushy black eyebrows, thick unkempt gray hair, snow-white beard. It is quite easy to imagine him attired in sealskins, standing in the prow of one of the Ice Age longboats that he suggests may have carried the first human voyagers to the Americas. But Stanford is not a mariner by trade. He heads the Smithsonian Institution’s Paleo-Indian program. 

Once upon a time, scientists believed they knew when, where, and how the first human beings arrived in North America. During the last Ice Age, bands of hunter-gatherers living in Siberia walked across the Bering Land Bridge and then southward, by means of an “ice-free corridor” which opened through the ice sheet that covered much of North America. By 11,500 BC, they had made it as far south as New Mexico, as evidenced by archaeological excavations that have unearthed evidence of a specific style of tool-making called Clovis, named after a nearby town. Clovis spear points were fashioned from a single stone, by means of what is called bifacial flaking. The people who made these tools went on to populate all of the Americas.

Some archaeologists are trying to challenge this tidy scenario. One of the chief challengers has been Dennis Stanford.

Stanford didn’t set out to be a spoiler. But as he attempted to follow the origins of Clovis technology back to its supposed origin in eastern Siberia, the trail went cold. The spear points used by the aboriginal Siberians look nothing like those recovered from Clovis. Rather, they are created by means of what is called “microblade” technology.

Stanford hands me a replica of such a point. Several flint blades, each created from a single flake of stone, are set in grooves in a bone handle.

So if Clovis technology didn’t come from Asia, as he suggests, where might it have originated? Stanford has advanced a radical hypothesis: Perhaps Clovis technology has its roots in Europe.

More than 20,000 years ago, inhabitants of what is today Western Europe employed a style of tool-making similar to that of Clovis, called Solutrean, named after the Rock of Solutré in eastern France. Some Solutreans congregated near the coast. They left behind carvings depicting auks, deep-sea fish such as salmon and tuna, and seals or walruses being harpooned or caught in nets. Stanford has suggested a daring alternative to traditional views, proposing a testable hypothesis that some Ice Age seafarers could have crossed the Atlantic Ocean from Europe to North America over 20,000 years ago.

Stanford notes that Europe during the Ice Ages was relatively devoid of trees, but they probably had access to driftwood, in the form of large fallen trees transported there by the Gulf Stream. They should have figured out that there was land to the west, somewhere beyond the horizon.

“These people weren’t bothered by cell phones and all this crap. They’re watching the sky every night, they’re watching this, they’re watching that. And they’re watching these big trees coming and they’re wondering, ‘Where in the Hell are all those big trees coming from? We don’t have ‘em over here.’ So they knew there was something over there.”

Back then the ice sheets extended as far south as 40 degrees north latitude. Seemingly endless herds of seals resting on the pack ice might have been an irresistible target for the Solutreans. These ancient mariners might have sallied forth in boats with sealskin stretched over wood frames, like those used by the modern-day Inuit.  If you’re hunting seals, the more eyes you have to watch breathing holes the better your chance of success. Entire family groups might have joined in on these expeditions. As their long-distance seafaring capabilities grew, they might have ranged farther and farther until finally arriving on the coast of North America.

It’s not inconceivable. The Solutreans had eyed needles they could have used to stitch together sealskins to make boats and waterproof clothing. (Similar needles have been found in Clovis sites as well.) With sea levels lower than they are now, the distance they had to cross would have been about 1400 miles—shorter than the journey from Alaska to Greenland the Thule people are known to have made in prehistoric times.

Critics point to the complete lack of evidence of practical long-distance seafaring capability of any Ice Age peoples. But Stanford notes that the boats they would have used would have been made of perishable materials, and at any rate would have been submerged when sea levels rose as the ice sheet melted at the end of the last Ice Age.

Archaeologists have found evidence of human habitation antedating Clovis by thousands of years, including sites on the eastern shore of the Chesapeake Bay.  Tools associated with these sites have a distinctly Solutrean look.

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 Above: Typical Solutrean style points and artifacts found in Europe. World Imaging, Wikimedia Commons

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Stanford shows me some other artifacts. In addition to bifacial spear points, there are bone points, spear throwers, bow drills, hammerstones, scrapers, and flat stones that still retain traces of birch sap, which may have been used to apply waterproof seals to their boats.

“Everything the Solutreans had, they have here,” Stanford explains. “Of course, that’s just coincidence.” Then he laughs that infectious laugh of his.

What’s more, these sites actually pre-date the existence of the ice-free corridor that is believed to have enabled the first Americans to travel here from Siberia. It’s possible that the first Americans came by traversing the margin of the ice sheet on the west coast, but that would actually be a longer journey than the proposed migration across the Atlantic.

Stanford opens another drawer and shows some spear points recovered from Tennessee. The points are over 14,000 years old, he says, which makes them older than Clovis points. Intriguingly, they seem intermediate in form between Solutrean and Clovis technology, providing a possible link between the two cultures.

He opens yet another drawer and pulls out a spear point he says archaeologists recovered while excavating the ruins of an eighteenth-century farmhouse in Virginia. X-ray fluorescence revealed the flint came from France. Stanford wanted to carry out a proper excavation, but the landowner refused to allow it. The state granted the owner permission to bulldoze the site.

“They said there’s no such thing as pre-Clovis culture anyway,” he adds, and again he laughs his infectious laugh.

Almost every part of Stanford’s argument has been vigorously disputed by the scientific community. Recent genetic studies have tended to support the East Asian/Siberian origins of Native Americans. And last year, James Walker and David Clinnick of Durham University published a critical appraisal of the Solutrean hypothesis in World Archaeology. In a telephone interview, Mr. Clinnick stated “For us, the Solutrean hypothesis is not a likely scenario. But as far as the other issue — how people came from East Asia into the Americas — I think we’re pretty open to multiple different conversations.”

Mr. Walker added, “There are different theories as to how the first people got to the Americas. And there are, as David and I see it, problems and good things about all these different ones. But I think the lack of a clean-cut answer at this stage is perhaps what has driven them to look for alternatives. I really feel it’s like one of the last big mysteries in archaeology that we haven’t got our heads wrapped around yet and maybe we won’t.”

Meanwhile, Stanford is showing no signs of slowing down. He has identified four more ancient sites on the eastern shore where he plans to begin excavations.

As I am leaving, Stanford recalls an incident from his youth:  In Point Barrow, Alaska, he met three men who told a tale of a fantastic voyage. While hunting seals they were cast adrift on an ice floe, floating past the North Pole all the way to the eastern coast of Greenland, a journey of thousands of miles. They survived by spearing seals, using the rendered fat to build fires on the ice and drinking the melted water. At last they were picked up by an Icelandic Coast Guard vessel and flown to New York, and from there back to their homes. Stanford told the men about his theory of how the first European voyagers came to America thousands of years ago, expecting to meet with incredulity. Instead, they shrugged.

“So what?” Stanford recalls them saying. “Even a white man could do that.”

 

Correction: A previous version of this article incorrectly described the artifact mentioned in the first paragraph as coming from the Chesapeake Bay and dating from 22,000 years ago.

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Did you like this? Read about the Solutrean Hypothesis in greater detail in the feature article, Out of Europe, published in the June 2013 issue of Popular Archaeology.

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This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  

 

 

 

 

Mummification was commonplace in Bronze Age Britain

UNIVERSITY OF SHEFFIELD—Ancient Britons may have intentionally mummified some of their dead during the Bronze Age (c. 2500 – 800 BC), according to archaeologists at the University of Sheffield.

The study is the first to provide indications that mummification may have been a widespread funerary practice in Britain.

Working with colleagues from the University of Manchester and University College London, Dr Tom Booth analyzed skeletons at several Bronze Age burial sites across the UK. The team from the University of Sheffield’s Department of Archaeology found that the remains of some ancient Britons are consistent with a prehistoric mummy from northern Yemen and a partially mummified body recovered from a sphagnum peat bog in County Roscommon, Ireland.

Building on a previous study conducted at a single Bronze Age burial site in the Outer Hebrides, Dr Booth used microscopic analysis to compare the bacterial bio-erosion of skeletons from various sites across the UK with the bones of the mummified bodies from Yemen and Ireland.

Archaeologists widely agree that the damp British climate is not favorable to organic materials and all prehistoric mummified bodies that may be located in the UK will have lost their preserved tissue if buried outside of a preservative environment such as a bog.

Dr Booth, who is now based at the Department of Earth Sciences at London’s Natural History Museum, said: “The problem archaeologists face is finding a consistent method of identifying skeletons that were mummified in the past – especially when they discover a skeleton that is buried outside of a protective environment.

“To help address this, our team has found that by using microscopic bone analysis archaeologists can determine whether a skeleton has been previously mummified even when it is buried in an environment that isn’t favorable to mummified remains.

“We know from previous research that bones from bodies that have decomposed naturally are usually severely degraded by putrefactive bacteria, whereas mummified bones demonstrate immaculate levels of histological preservation and are not affected by putrefactive bio-erosion.”

Earlier investigations have shown that mummified bones found in the Outer Hebrides were not entirely consistent with mummified remains found elsewhere because there wasn’t a complete absence of bacterial bio-erosion.

However, armed with a new technique, the team were able to re-visit the remains from the Outer Hebrides and use microscopic analysis to test the relationship between bone bio-erosion and the extent of soft tissue preservation in bone samples from the Yemeni and Irish mummies.

Their examinations revealed that both the Yemeni and Irish mummies showed limited levels of bacterial bio-erosion within the bone and therefore established that the skeletons found in the Outer Hebrides as well as other sites across Britain display levels of preservation that are consistent with mummification.

The research team also found that the preservation of Bronze Age skeletons at various sites throughout the UK is different to the preservation of bones dating to all other prehistoric and historic periods, which are generally consistent with natural decomposition. Furthermore, the Sheffield-led researchers also found that Bronze Age Britons may have used a variety of techniques to mummify their dead.

Dr Booth added, “Our research shows that smoking over a fire and purposeful burial within a peat bog are among some of the techniques ancient Britons may have used to mummify their dead. Other techniques could have included evisceration, in which organs were removed shortly after death.

“The idea that British and potentially European Bronze Age communities invested resources in mummifying and curating a proportion of their dead fundamentally alters our perceptions of funerary ritual and belief in this period.”

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 The Skrydstrup Woman, example of a European mummy found in a tumulus in Denmark. She was discovered in 1935 and dated to 1300 BCE. Wikimedia Commons

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The research also demonstrates that funerary rituals that we may now regard as exotic, novel and even bizarre were practiced commonly for hundreds of years by our predecessors.

Also, this method of using microscopic bone analysis to identify formerly-mummified skeletons means that archaeologists can continue searching for Bronze Age mummies throughout Europe.

“It’s possible that our method may allow us to identify further ancient civilizations that mummified their dead,” Dr Booth concluded.

The research, funded by the Arts and Humanities Research Council, was published in the journal Antiquity.

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Source: Edited from the subject press release of the University of Sheffield. 

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This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  

 

 

 

 

Possible site of ancient Sodom yields more finds

Now having completed the tenth season of excavations, an archaeological team headed by Steven Collins of Trinity Southwest University, New Mexico, has unearthed a goldmine of ancient monumental structures and artifacts that are revealing a massive Bronze Age city-state that dominated the region of Jordan’s southern Jordan Valley, even during a time when many other great cities of the “Holy Land” region were either abandoned or in serious decline.

Known as Tall el-Hammam, Collins has been leading excavations at the imposing mound, or tel, since 2005.

“Very, very little was known about the Bronze Age in the Middle Ghor (southern Jordan Valley) before we began our excavations in 2005,” says Collins. “Even most of the archaeological maps of the area were blank, or mostly so. What we’ve got on our hands is a major city-state that was, for all practical purposes, unknown to scholars before we started our Project.”

Indeed, according to Collins, when comparing it with the remains of other nearby ancient cities, along with its prime location and dates of occupation, it emerges today as the best candidate for the lost city of Sodom—the infamous city that, based on the Biblical account, was destroyed by God in a fiery cataclysm because of its iniquity. 

“Tall el-Hammam seemed to match every Sodom criterion demanded by the text,” he says.  “Theorizing, on the basis of the Sodom texts, that Sodom was the largest of the Kikkar (the Jordan ‘Disk’, or ‘well-watered plain’ in the biblical text) cities east of the Jordan, I concluded that if one wanted to find Sodom, then one should look for the largest city on the eastern Kikkar that existed during the Middle Bronze Age, the time of Abraham and Lot. When we explored the area, the choice of Tall el-Hammam as the site of Sodom was virtually a no-brainer since it was at least five to ten times larger than all the other Bronze Age sites in the entire region, even beyond the Kikkar of the Jordan.”

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kikkar

Map showing location of Tall el-Hammam in the ‘Kikkar’ of the Jordan with surrounding archaeological sites. Courtesy Tall el-Hammam Excavation Project (TeHEP), from the article, Making the Case for Sodom. published June 5, 2014 in Popular Archaeology.

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hammamuppertall

View of Tall el-Hammam. The mound is the most prominent feature on the landscape for miles around. Courtesy Tall el-Hammam Excavation Project, from the article. Making the Case for Sodom, published June 5, 2014 in Popular Archaeology. 

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But Collins would be the first to say that the story of this site is far more than the possible discovery of a lost Biblical city. It is, first and foremost, the story of an ancient people who built a massive Bronze Age city that thrived and prospered in a place strategically located among key water resources and trade routes, emerging as the central hub of a dominant city-state during the Early and Middle Bronze Ages (between 3500 and 1540 B.C.).

“The site is monstrous,” say Collins. He describes the site as consisting of both a lower and upper city. It features Early Bronze Age (3500 – 2350 BCE) evidence for a 5.2 meter thick city wall (built and then re-built stronger following an earthquake) as much as 10 meters in height and made entirely of mudbricks, with associated gates, towers, at least one roadway, and plazas. During the Middle Bronze Age (2000 – 1540 BCE), new construction, even more massive than those of the Early Bronze Age, replaced the old. To fortify the upper city, the Middle Bronze Age inhabitants built a massive mudbrick defensive rampart system. “It was a huge undertaking, requiring millions of bricks and, obviously, large numbers of laborers,” states Collins. “The flat top of the rampart was about 7m (22 ft.) wide, and probably served as a ring-road around the upper city. The outer edge of the rampart has a footprint of approximately 250m x 400m. The 36-degree outer slope was covered with hard-packed clay, and rose over 30m (100 ft.) above the lower city. It was an impressive and formidable defensive system protecting the residences of the wealthier citizens of the city, including the king’s palace and related temples and administrative buildings.”* Moreover, in the lower city they followed the lines of the earlier, Early Bronze Age city walls and constructed a 4m-thick city wall built on a foundation of large stones and topped, like the upper city wall, by a mudbrick superstructure. This, too, was reinforced by an earthen/mudbrick rampart system sloping down and out at about 35-38 degrees from the new lower city wall. Put together, Collins says, the lower city defensive works rise over 100 feet above the surrounding plain, with the upper city rampart rising an additional 100+ feet above the lower city/tall. More Middle Bronze Age finds included a large monumental complex in the lower city/tall, remains of a mudbrick palatial structure in the upper city/tall (called the “red palace” because of the color of the mudbricks due to a fiery conflagration), and remains of a monumental gateway complex. The close of the 10th season in 2015 confirmed a few more surprises, including clear evidence that the Middle Bronze Age walls and fortifications were more extensive than previously thought, including the uncovering of more towers and gates. 

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hammamEBcitywall

Dr. Collins (left) and Gary Byers atop excavated EB (Early Bronze) city wall foundation. Courtesy Mike Luddeni, from the article. Making the Case for Sodom, published June 5, 2014 in Popular Archaeology.

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But based on the excavated evidence, the city’s Bronze Age heyday seems to have nevertheless come to a sudden, inexplicable end toward the end of the Middle Bronze Age—and the ancient city became a relative wasteland for 700 years, for the most part void of human habitation. The comparatively paltry or lack of Late Bronze Age material is a testament to this, with the same pattern shown in the smaller, nearby sites. A strange development, thinks Collins, for a great city-state that flourished even through the catastrophic climate changes that arguably led to the collapse of the great cities of the Levantine Early Bronze Age around 2350 BCE. Collins is hoping that further research and excavation may shed more light on this mystery.

Life at this ancient site returned after the 700-year gap, however. Excavations have shown a clear monumental Iron Age II (1000 – 332 BCE) presence, for example, with the discovery of a monumental gateway, city wall, monumental building, houses, and what has been interpreted as a cultic center. But these structures were not constructed until centuries later, on a relatively small scale, and the sheer magnitude of the Bronze Age construction never returned.

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See the article, Making the Case for Sodom for more information, including additional images, about the excavations at Tall el-Hammam. In addition, a detailed report of the 10th season of excavations can be accessed here.

*http://www.tallelhammam.com/Recent_Discoveries.html#Chronological_Key

Source: Updated from the article, Making the Case for Sodom, published June 5, 2014 in Popular Archaeology Magazine.

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summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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Fossilized ear bones reveal human ancestors heard higher frequencies

BINGHAMTON, NY – Research into human fossils dating back to approximately two million years ago reveals that the hearing pattern resembles chimpanzees, but with some slight differences in the direction of humans.

Rolf Quam, assistant professor of anthropology at Binghamton University, led an international research team in reconstructing an aspect of sensory perception in several fossil hominin individuals from the sites of Sterkfontein and Swartkrans in South Africa. The study relied on the use of CT scans and virtual computer reconstructions to study the internal anatomy of the ear. The results suggest that the early hominin species Australopithecus africanus and Paranthropus robustus, both of which lived around 2 million years ago, had hearing abilities similar to a chimpanzee, but with some slight differences in the direction of humans.

Humans are distinct from most other primates, including chimpanzees, in having better hearing across a wider range of frequencies, generally between 1.0-6.0 kHz. Within this same frequency range, which encompasses many of the sounds emitted during spoken language, chimpanzees and most other primates lose sensitivity compared to humans.

“We know that the hearing patterns, or audiograms, in chimpanzees and humans are distinct because their hearing abilities have been measured in the laboratory in living subjects,” said Quam. “So we were interested in finding out when this human-like hearing pattern first emerged during our evolutionary history.”

Previously, Quam and colleagues studied the hearing abilities in several fossil hominin individuals from the site of the Sima de los Huesos (Pit of the Bones) in northern Spain. These fossils are about 430,000 years old and are considered to represent ancestors of the later Neandertals. The hearing abilities in the Sima hominins were nearly identical to living humans. In contrast, the much earlier South African specimens had a hearing pattern that was much more similar to a chimpanzee.

In the South African fossils, the region of maximum hearing sensitivity was shifted towards slightly higher frequencies compared with chimpanzees, and the early hominins showed better hearing than either chimpanzees or humans from about 1.0-3.0 kHz. It turns out that this auditory pattern may have been particularly favorable for living on the savanna. In more open environments, sound waves don’t travel as far as in the rainforest canopy, so short range communication is favored on the savanna.

“We know these species regularly occupied the savanna since their diet included up to 50 percent of resources found in open environments” said Quam. The researchers argue that this combination of auditory features may have favored short-range communication in open environments.

That sounds a lot like language. Does this mean these early hominins had language? “No,” said Quam. “We’re not arguing that. They certainly could communicate vocally. All primates do, but we’re not saying they had fully developed human language, which implies a symbolic content.”

The emergence of language is one of the most hotly debated questions in paleoanthropology, the branch of anthropology that studies human origins, since the capacity for spoken language is often held to be a defining human feature. There is a general consensus among anthropologists that the small brain size and ape-like cranial anatomy and vocal tract in these early hominins indicates they likely did not have the capacity for language.

“We feel our research line does have considerable potential to provide new insights into when the human hearing pattern emerged and, by extension, when we developed language,” said Quam.

Ignacio Martinez, a collaborator on the study, said, “We’re pretty confident about our results and our interpretation. In particular, it’s very gratifying when several independent lines of evidence converge on a consistent interpretation.”

How do these results compare with the discovery of a new hominin species, Homo naledi, announced just two weeks ago from a different site in South Africa?

“It would be really interesting to study the hearing pattern in this new species,” said Quam. “Stay tuned.”

The study was published on Sept. 25 in the journal Science Advances.

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paranthropus

This is a lateral view of the Paranthropus robustus skull SK 46 from the site of Swartkrans, South Africa showing the 3-D virtual reconstruction of the ear and the hearing results for the early hominins. Credit Rolf Quam

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taungdidierdescouens

 Skull of the Taung Child, the first Australopithecus africanus fossil find, discovered by Raymond Dart in South Africa in 1924. Wikimedia Commons, Didier Descouens 

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*R. Quam, et al., Early hominin auditory capacities, Science Advances 25 September 2015

Source: Edited from the subject Binghamton University and Science Advances press releases.

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Did you like this?  Read more about the discoveries at the Swartkrans cave,  a free premium article in the December 2013 issue of Popular Archaeology.

 

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summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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Stem cell research hints at evolution of human brain

University of California – San Francisco—The human cerebral cortex contains 16 billion neurons, wired together into arcane, layered circuits responsible for everything from our ability to walk and talk to our sense of nostalgia and drive to dream of the future. In the course of human evolution, the cortex has expanded as much as 1,000-fold, but how this occurred is still a mystery to scientists.

Now, researchers at UC San Francisco have succeeded in mapping the genetic signature of a unique group of stem cells in the human brain that seem to generate most of the neurons in our massive cerebral cortex.

The new findings, published Sept. 24, 2015 in the journal Cell, support the notion that these unusual stem cells may have played an important role in the remarkable evolutionary expansion of the primate brain.

“We want to know what it is about our genetic heritage that makes us unique,” said Arnold Kriegstein, MD, PhD, professor of developmental and stem cell biology and director of the Eli and Edyth Broad Center of Regeneration Medicine and Stem Cell Research at UCSF. “Looking at these early stages in development is the best opportunity to understand our brain’s evolution.”

Building a Brain from the Inside Out

The grand architecture of the human cortex, with its hundreds of distinct cell types, begins as a uniform layer of neural stem cells and builds itself from the inside out during several months of embryonic development.

Until recently, most of what scientists knew about this process came from studies of model organisms such as mice, where nearly all neurons are produced by stem cells called ventricular radial glia (vRGs) that inhabit a fertile layer of tissue deep in the brain called the ventricular zone (VZ). But recent insights suggested that the development of the human cortex might have some additional wrinkles.

In 2010, Kriegstein’s lab discovered a new type of neural stem cell in the human brain, which they dubbed outer radial glia (oRGs) because these cells reside farther away from the nurturing ventricles, in an outer layer of the subventricular zone (oSVZ). To the researchers’ surprise, further investigations revealed that during the peak of cortical development in humans, most of the neuron production was happening in the oSVZ rather than the familiar VZ.

oRG stem cells are extremely rare in mice, but common in primates, and look and behave quite differently from familiar ventricular radial glia. Their discovery immediately made Kriegstein and colleagues wonder whether this unusual group of stem cells could be a key to understanding what allowed primate brains to grow to their immense size and complexity.

“We wanted to know more about the differences between these two different stem cell populations,” said Alex Pollen, PhD, a postdoctoral researcher in Kriegstein’s lab and co-lead author of the new study. “We predicted oRGs could be a major contributor to the development of the human cortex, but at first we only had circumstantial evidence that these cells even made neurons.”

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cerebralcortex

 

 Drawing of the cerebral cortex. Wikimedia Commons, Wellcome Images

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Outsider Stem Cells Make Their Own Niche

In the new research, Pollen and co-first author Tomasz Nowakowski, PhD, also a postdoctoral researcher in the Kriegstein lab, partnered with Fluidigm Corp. to develop a microfluidic approach to map out the transcriptional profile – the set of genes that are actively producing RNA – of cells collected from the VZ and SVZ during embryonic development.

They identified gene expression profiles typical of different types of neurons, newborn neural progenitors and radial glia, as well as molecular markers differentiating oRGs and vRGs, which allowed the researchers to isolate these cells for further study.

The gene activity profiles also provided several novel insights into the biology of outer radial glia. For example, researchers had previously been puzzled as to how oRG cells could maintain their generative vitality so far away from the nurturing VZ. “In the mouse, as cells move away from the ventricles, they lose their ability to differentiate into neurons,” Kriegstein explained.

But the new data reveals that oRGs bring a support group with them: The cells express genes for surface markers and molecular signals that enhance their own ability to proliferate, the researchers found.

“This is a surprising new feature of their biology,” Pollen said. “They generate their own stem cell niche.”

The researchers used their new molecular insights to isolate oRGs in culture for the first time, and showed that these cells are prolific neuron factories. In contrast to mouse vRGs, which produce 10 to 100 daughter cells during brain development, a single human oRG can produce thousands of daughter neurons, as well as glial cells–non-neuronal brain cells increasingly recognized as being responsible for a broad array of maintenance functions in the brain.

New Insights into Brain Evolution, Development and Disease

The discovery of human oRGs’ self-renewing niche and remarkable generative capacity reinforces the idea that these cells may have been responsible for the expansion of the cerebral cortex in our primate ancestors, the researchers said.

The research also presents an opportunity to greatly improve techniques for growing brain circuits in a dish that reflect the true diversity of the human brain, they said. Such techniques have the potential to enhance research into the origins of neurodevelopmental and neuropsychiatric disorders such as microcephaly, lissencephaly, autism and schizophrenia, which are thought to affect cell types not found in the mouse models that are often used to study such diseases.

The findings may even have implications for studying glioblastoma, a common brain cancer whose ability to grow, migrate and hack into the brain’s blood supply appears to rely on a pattern of gene activity similar to that now identified in these neural stem cells.

“The cerebral cortex is so different in humans than in mice,” Kriegstein said. “If you’re interested in how our brains evolved or in diseases of the cerebral cortex, this is a really exciting discovery.”

The study represents the first salvo of a larger BRAIN Initiative-funded project in Kriegstein’s lab to understand the thousands of different cell types that occupy the developing human brain.

“At the moment, we simply don’t have a good understanding of the brain’s ‘parts list,'” Kriegstein said, “but studies like this are beginning to give us a real blueprint of how our brains are built.”

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Source: University of California-San Francisco press release.

Major funding for the research was provided by the National Institutes of Health, the UCSF Clinical and Translational Science Institute, and the Damon Runyon Cancer Research Foundation.

Additional authors on the study are Jiadong Chen, PhD; Hanna Retallack; Carmen Sandoval-Espinosa; Cory Nicholas, PhD; S. John Liu; Michael Oldham, PhD; Aaron Diaz, PhD; and Daniel Lim, MD, PhD, all of UCSF; and Anne Leyrat, PhD; Joe Shuga, PhD; and Jay West, PhD, of Fluidigm Corp. Nicholas is now at Neurona Therapeutics. Leyrat, Shuga and West declare a financial interest in Fluidigm Corp. as employees and/or stockholders.

UC San Francisco (UCSF) is a leading university dedicated to promoting health worldwide through advanced biomedical research, graduate-level education in the life sciences and health professions, and excellence in patient care. It includes top-ranked graduate schools of dentistry, medicine, nursing and pharmacy, a graduate division with nationally renowned programs in basic, biomedical, translational and population sciences, as well as a preeminent biomedical research enterprise and two top-ranked hospitals, UCSF Medical Center and UCSF Benioff Children’s Hospital San Francisco. Please visit http://www.ucsf.edu.

Cover photo: Wikimedia Commons, http://wellcomeimages.org/indexplus/obf_images/59/92/da8e89c7c8f6dc66400920168f1c.jpg

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summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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The Golden Age of King Midas

PHILADELPHIA, PA September 2015—What was behind the legendary story of King Midas and his golden touch?

That is the question that will be answered—not with chests full of gold, but with a spectacular array of specially-loaned ancient artifacts from the Republic of Turkey, keys to telling the true story of a very real, very powerful ruler of the Phrygian kingdom in what is now central Turkey. The Golden Age of King Midas, an exclusive, world premiere exhibition developed by the Penn Museum, 3260 South Street in Philadelphia, in partnership with the Republic of Turkey, runs February 13 through November 27, 2016. 

King Midas lived in the prosperous city of Gordion circa 750-700 BCE, ruling Phrygia and influencing neighboring kingdoms, from Assyria and Urartu, to the city-states of North Syria, Lydia, Greece, and beyond. He likely reigned during the time in which Homer’s Iliad was first written down. It was indeed a golden age.

Archaeologists from the Penn Museum (the University of Pennsylvania Museum of Archaeology and Anthropology) have been excavating at the important ancient site of Gordion—and making international headlines with their discoveries—since 1950. This rich site, a cross-roads of many cultures over time, offers insight into thousands of years of history, but it is best known as the political and cultural capital of the Phrygians, a people who dominated much of what is now Turkey nearly 3,000 years ago. With its monumental architecture and a series of wealthy tombs belonging to Phrygian royalty and elites, Gordion is the premiere archaeological site for discovering the unique material achievements of the once great Phrygian civilization.

A Rare Opportunity

In 1957, the Penn Museum excavated a spectacular tomb, the Tumulus MM (Midas Mound), the largest of about 120 man-made mounds of earth, clay, and stone used to mark  important burials at Gordion. Dated to about 740 BCE, it is believed to be the final resting place of King Midas’ father Gordias. The archaeologists entered the tomb, the oldest standing wooden building in the world, and beheld an extraordinary sight: the skeleton of a king in what was left of a cedar coffin, surrounded by all the bronze bowls, serving vessels, wooden tables, and food remains from an extensive funeral banquet.

Now housed in Turkish Museums in Ankara, Istanbul, Antalya, and Gordion, most of these extraordinary artifacts have never before traveled to the United States. For the first time, about 120 objects from Turkey, primarily from Tumulus MM and hand selected by exhibition curator Dr. C. Brian Rose, Penn Museum’s Gordion Archaeological Project Director, come to Philadelphia for this exclusive, limited-time engagement. One additional highlight of the exhibit will be an ivory lion tamer figurine on loan from the Delphi Archaeological Museum; it probably formed part of a throne dedicated by Midas to Apollo in the late eighth century BCE. Artifacts from nearby kingdoms, drawn from the Penn Museum’s own international collection, supplement the exhibition and tell the broader story of a golden age presided over by a legendary king.

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G-2390

A partial view inside Tumulus MM—the burial chamber of a Phrygian ruler, probably the father of King Midas. Tumulus MM is the oldest known intact wooden building in the world. Exhibited: One of the three cauldrons found inside the tomb, probably all used for beer, features two siren attachments and two bearded demon attachments. Bronze drinking bowls are scattered across the floor of the tomb chamber, dated to circa 740 BCE, and excavated by the Penn Museum in 1957. Photo: 1957, Penn Museum Gordion Archive, G-2390.

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G-3397

Exhibited: This black polished goat jug, 8.2 inches in length, 5.9 inches in height, and 4.7 inches in width, was excavated from Tumulus P, the burial chamber of a royal child, at Gordion in central Turkey. The jug dates to circa 760 BCE; it was excavated in 1956. Photo: Museum of Anatolian Civilisations, Ankara, 12789c.

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CauldronDetail

Exhibited: Detail of one of the three massive bronze cauldrons from Tumulus MM, tomb of a Phrygian ruler, probably the father of King Midas. The figure of a siren and the associated ring handle form one of four attachments on the cauldron. The cauldron probably once held an alcoholic beverage made of barley beer, grape wine, and honey mead, part of an elaborate funeral banquet for the deceased ruler. The cauldron dates to circa 740 BCE. It was excavated by the Penn Museum at Gordion in 1957. Dimensions—Height: 20.2 inches. Diameter: 30.7 inches (diameter at rim: 23 inches). Capacity: about 40 gallons [=150 liters]. Photo: Penn Museum Gordion Archive, 2014_4080.

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MosaicSegment

Exhibited: Part of the colored pebble mosaic floor, the oldest known in the world, found in a large hall excavated inside the citadel at Gordion in 1956. One of 33 panels removed for conservation and display in 1963, this piece was newly conserved in the summer of 2015 by the team at Gordion. It dates to the late 9th century BCE. Photo: Penn Museum Gordion Archive, 2015_04663.

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Editor’s Note: For more detailed information about the recent discoveries at Gordion, see the feature article, Unearthing the City of King Midas.  

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The Golden Age of King Midas opens with a day-long celebration on February 13, 2016. A gala preview evening is planned for Friday, February 5.

The Golden Age of King Midas is made possible with support from Frederick J. Manning, W69, and the Manning Family; the Susan Drossman Sokoloff and Adam D. Sokoloff Exhibitions Fund, and an anonymous donor.

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The Penn Museum (the University of Pennsylvania Museum of Archaeology and Anthropology) is dedicated to the study and understanding of human history and diversity. Founded in 1887, the Museum has sent more than 300 archaeological and anthropological expeditions to all the inhabited continents of the world. With an active exhibition schedule and educational programming for children and adults, the Museum offers the public an opportunity to share in the ongoing discovery of humankind’s collective heritage.

The Penn Museum is located at 3260 South Street, Philadelphia, PA 19104 (on the University of Pennsylvania  campus). Museum hours are Tuesday through Sunday, 10:00 am to 5:00 pm, and first Wednesdays of each month until 8:00 pm. Closed Mondays and holidays. Admission donation is $15 for adults; $13 for senior citizens (65 and above); free for U.S. Military; $10 for children and full-time students with ID; free to Members, PennCard holders, and children 5 and younger.

Penn Museum can be found on the web at www.penn.museum. For general information call 215.898.4000. For group tour information call 215.746.8183.

Source: Press release of the Penn Museum.

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9,000 year-old ritualized decapitation found in Brazil

A 9,000 year-old case of human decapitation has been found in the rock shelter of Lapa do Santo in Brazil, according to a study* published September 23, 2015 in the open-access journal PLOS ONE by André Strauss from the Max Planck Institute for Evolutionary Anthropology, Germany and colleagues.

An archaeological site called Lapa do Santo, located in east-central Brazil, contains evidence of human occupation dating back to ~12,000 years ago. In 2007, researchers found fragments of a buried body, Burial 26, including a cranium, jaw, the first six cervical vertebrae, and two severed hands at the site. They dated the remains back to ~9,000 years ago using accelerator mass spectrometry. The researchers found amputated hands laid over the face of the skull arranged opposite each other and observed v-shaped cut marks on the jaw and sixth cervical vertebra.

Based on strontium analysis comparing Burial 26’s isotopic signature to other specimens from Lapa do Santo, the researchers suggest Burial 26 was likely a local member of the group. Additionally, the presentation of the remains lead the authors to think that this was likely a ritualized decapitation instead of trophy-taking. If this is the case, these remains may demonstrate sophisticated mortuary rituals among hunter-gatherers in the Americas during this time period. The authors think this may be the oldest case of decapitation found in the New Word, leading to a re-evaluation of the previous interpretations of this practice, particularly with regard to its origins and geographic dispersion.

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decapitatedpic

This is a schematic representation of Burial 26 from Lapa do Santo. Drawing by Gil Tokyo.

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*Strauss A, Oliveira RE, Bernardo DV, Salazar-García DC, Talamo S, Jaouen K, et al. (2015) The Oldest Case of Decapitation in the New World (Lapa do Santo, East-Central Brazil).PLoS ONE 10(9): e0137456. doi:10.1371/journal. pone.0137456

Source: The subject PLOS ONE press release.

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summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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Website walks visitors on virtual tour of biblical archaeological sites

Petra.  Masada.  Herodium.  Jericho.  Qumran.

These are “Holy Land” archaeological sites of which most of us have heard but comparatively few of us have actually visited in person. There are obvious reasons for that—cost, time, cost, other commitments, cost, other priorities, cost. For those of us who have a passion for things archaeological, especially as they apply to the biblical account and the Middle East in general, such places remain mostly uncrossed on the travel wish list.

But what if you were told that you could ‘visit’ these places without incurring the fortune of airfare, hotel expenses and food, without ever having to hassle with security check lines, step onto an airplane or ride a bus or take a taxi?

One website, called the Virtual World Project, can do that for us. Featuring archaeological sites from Abu Ghosh to Zohar, the website offers virtual grand tours of no less than 106 sites.

Want to walk through the famous mountaintop fortress of Masada, one of the architectural wonders built by the infamous King Herod and the historic last enclave of rebel Jewish forces during the First Jewish Revolt against the Romans? Feeling like strolling through the desert ruins of Qumran, the ancient community thought to have connections to the Dead Sea Scrolls? Having an urge to wander through the remarkable, iconic remains of the ancient city of Petra?

If this sounds like a commercial, in a sense you would be right. But the architects of this website receive no compensation for sharing this experience with the public. Conceived and constructed by Ronald Simkins and Nicolae Roddy, both professors at Creighton University in Omaha, Nebraska, the website was intended largely as an educational tool for students, offering not only interactive panning views of the sites, but also text about each site to inform the viewer. A salient feature of the website is the convenient control it affords the site visitors to tailor their own walking itineraries through each site, and the easy opportunity to tour many other sites of which most visitors may never have even heard.  Ever hear of Iraq al-Amir? Located about 17 kilometers west of Amman, Jordan, the monumental remains of this Hellenistic palace locally called Qasr al-Abd, built by Hyrcanus the Tobiad more than a century before the birth of Jesus, will no doubt impress you.  It is an example of scores of sites most of us wouldn’t think of listing on our travel itineraries.

But enough said.

As they say, a picture is worth a thousand words, so without further ado, here is the website for your perusal.

Bon voyage.

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 The remains of Qasr al-Abd at Iraq al-Amir, Jordan. Image credit Ronald Simkins and Nicolae Roddy, the Virtual World Project.

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The temple at Omrit: Less known than some of King Herod’s other monumental projects, the remains of a Roman temple overlooking today’s Hula valley in northeastern Israel stands as a visual reminder of Herod’s heady days of massive construction works. Also viewable in detail at the Virtual World Project website. Image credit Ronald Simkins and Nicolae Roddy, the Virtual World Project.

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peter sommer travels image

summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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DNA evidence from massive trove of bones shakes up human evolution

Lost in the media frenzy surrounding the discovery of Homo naledi, the new early human species identified from the excavations at the Rising Star cave complex in South Africa, was another equally stunning development that was reported on September 11, 2015 by Ann Gibbons in an article* published by Science. In that article, she related the announcement by a team of researchers that they had successfully sequenced nuclear DNA from 400,000+-year-old bones (the actual sampling taken from a tooth and leg bone) discovered in the Sima de los Huesos (‘Pit of Bones’) cave of northern Spain.

By doing so, the researchers, headed by Matthias Meyer of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, came to several game-changing conclusions about the course of human evolution:

First, that the early human species discovered in the Sima cave by the team headed by paleontologist Juan-Luis Arsuaga of the Complutense University of Madrid and colleagues were, as suspected, a human species related to Neanderthals, either as direct ancestors or ancestral to a sister group related to Neanderthals.

Second, given the age of the fossils and their morphology, the DNA finds significantly push back the timing of the origins of the Neanderthals. 

And third, the DNA makeup suggests that Homo sapiens, or modern humans, may have split away as a separate species from a common ancestor with Neanderthals and Denisovans (another ancient human species) as early as 550,000 to 765,000 years ago, 100,000 to 400,000 years earlier than previously thought. 

The findings have far-reaching implications for understanding the course of human evolution as it relates to the place of Neanderthals, Denisovans, and Homo sapiens in the human family tree (or ‘bush”, as many paleoanthropologists now prefer to call it). All three species are members of the same genus (Homo), and all three are thought to share a common ancestor. But the DNA findings, in tandem with the findings related to the osteological analyses of the 430,000-year-old fossils themselves, suggest an evolutionary picture considerably more complex than the model advanced by many scientists in the past, opening up a new series of questions revolving around where, when and how these separate species came to be and precisely who their common ancestor was.

Moreover, the DNA research highlights recent developments in sequencing ancient DNA, developments that have afforded geneticists the ability to unlock genetic codes in very ancient bone material to an extent never before thought possible, revealing more and more that the course of human evolution may have actually been a complex, “messy” process, and not the simple, straight-line model that scientists have traditionally suggested.

The excavation of over 6,700 human fossils representing 28 individuals in the Sima de los Huesos cave was the result of more than two decades of field work in the Atapuerca mountains of northern Spain, an area long known to contain a treasure trove of fossils of early humans and Neanderthals. The finds at Sima constitute the largest collection of archaic human fossil bones found at any single site in the world. Work at the site is ongoing, and scientists believe that more will yet emerge from the continuing study of the finds recovered from the site.

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Reconstructed skull 17 from the Sima de los Huesos site in Sierra de Atapuerca, Spain. This image relates to a paper that appeared in the 20 June, 2014, issue of Science, published by AAAS. The paper, by Juan-Luis Arsuaga at Centro Mixto UCM-ISCIII de Evolución y Comportamiento Humanos in Madrid, Spain, and colleagues was titled, ‘Neandertal roots: Cranial and chronological evidence from Sima de los Huesos.’ Image credit Javier Trueba / Madrid Scientific Films 

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*Ann Gibbons, DNA from Neandertal relative may shake up human family tree, Science, 11 September 2015.

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Did you like this? For more information about the Sima de los Huesos discoveries, see the article, Not Quite Neanderthal, published in the Fall 2015 issue of Popular Archaeology magazine.

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peter sommer travels image

summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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Can DNA evidence fill gaps in our history books?

Cell Press—If you go back far enough, all people share a common ancestry. But some populations are more closely related than others based on events in the past that brought them together. Now, researchers* reporting in the Cell Press journal Current Biology on September 17 have shown that it’s possible to use DNA evidence as a means to reconstruct and date those significant past events. The findings suggest that evidence in our genomes can help to recover lost bits of history.

“We now have the statistical machinery to uncover which historical events have produced the mosaic genomes of people in Europe today,” says George Busby of the University of Oxford. “The successful reconstruction of the genetic history of a region of the world that has been well investigated both archaeologically and historically suggests that these approaches have the potential to be applied to areas where history has not been so well recorded and where genetics might be the only way of recovering history.”

Busby and his colleagues applied a new method they’ve developed to compare single genetic variants among populations, taking into account the relationships among those markers based on their physical proximity along the chromosomes. That information can be used to infer subtle relationships among populations, including those that are genetically very similar, as well as the history of a continent.

The new work shows that all European populations have mixed over time as people picked up and moved from one place to another. Usually this mixing has involved nearby groups, but sometimes populations bear the mark of invading populations from more distant locations.

“Much as different cultures have often borrowed elements from each other, we are now seeing that the genomes of people alive in Europe today contain ancestry from multiple different places, from within Europe and outside,” says Cristian Capelli, the study’s senior author.

The results offer interesting insights into human history, including the lives of “regular people.”

“History is often written by the winners and the elites—we often do not hear about the everyday life of people,” Busby says. “By studying the DNA of populations and understanding how different groups are ancestrally related to each other, our analysis tells the story of all people.”

For example, the researchers found evidence of contact across Central Asia with groups from Mongolia. In fact, they see evidence that Mongolians migrated into Europe in two waves: once at a time that matches the known expansions of Genghis Khan and the other occurring much earlier, prior to 1000 CE in groups of North East Europe, including the Chuvash, Russians, and Mordovians.

The researchers also see evidence of mixing among Europeans in the Mediterranean and people from West and North Africa at many times and places over the course of history. The Slavic expansion also left its mark on European genomes, showing that this was a key event in the genetic history of the region.

The researchers say it’s now “clear that migration and admixture have been the norm, rather than the exception, throughout human history.”

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Gene flow within West Eurasia is shown by lines linking the best-matching donor group to the sources of admixture with recipient clusters (arrowhead). Line colors represent the regional identity of the donor group, and line thickness represents the proportion of DNA coming from the donor group. Ranges of the dates (point estimates) for events involving sources most similar to selected donor groups are shown.  Credit:  Busby et al./Current Biology 2015

 

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This research was supported by the University of Oxford, the Wellcome Trust, the Royal Society, the Biotechnology and Biological Sciences Research Council, and the British Academy. Co-author James Wilson is a shareholder, employee, and director of the commercial genetic ancestry testing company ScotlandsDNA.

*Current Biology, Busby et al.: “The Role of Recent Admixture in Forming the Contemporary West Eurasian Genomic Landscape” http://dx.doi.org/10.1016/j.cub.2015.08.007

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peter sommer travels image

summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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Archaeologist reconstructs faces of Stone Age people

Within his studio in the Stockholm suburban community of Tumba, Sweden, archaeologist-sculptor Oscar Nilsson is applying a highly specialized knowledge and set of skills to reconstruct realistic and scientifically-informed likenesses of individuals who lived long before us.

His work, unlike more ‘sensational’ archaeological and paleoanthropological discoveries reported in the press such as the identification of the bones of King Richard III and the more recent discovery of Homo naledi, do not make headlines. But he makes both written and unwritten history an up-close-and-personal experience for academics and the public alike. He creates, quite literally, faces of our collective past. 

One of his upcoming projects involves the reconstruction of the face of a Stone Age man whose remains were unearthed near Ulricehamn, Sweden in 1994.

“Judging from his bones he was extremely robust with very broad shoulders,” said Nilsson.“And the skull of this 45-60-year-old man exhibits a significant elevated ridge running from his forehead to the back of his head, making it peak-shaped from a frontal view. These well-preserved bones surprised everyone when the result of the C14 dating came back: he was 10,000 years old and, with that, Sweden’s oldest skeleton.” Archaeologists have named him “Bredgården Man”. His skeletal remains were found near a farmhouse by the same name.

Another upcoming project involves the facial reconstruction of a 14-year-old Stone Age girl whose remains were excavated together with a small child at  Tybrind Vig in Denmark in the 1970’s. Here, archaeologists excavated unusually well-preserved artifacts from the Ertebølle Culture, a European Neolithic culture, including a large kitchen midden. “To recover the girl’s remains and those of the child, archaeologists had to work underwater, as the bones were submerged 300 meters offshore to a depth of 3 – 4.5 meters,” said Nilsson. “In her time, her place of rest would have been dry, hugging the shore, when there was a greater abundance of inland ice in Scandinavia and the sea level was lower.”

The Stone Age girl reconstruction will join other objects of the Tybrind Vig discoveries at Denmark’s Moesgård Museum.

In fact, most of Nilsson’s hyper-realistic reconstructions end up in museums such as the Moesgård, where he hopes the public will, through his reconstructions, gain a more personal connection to history.

“History is made of actual people,” he says. “Making a facial reconstruction is like opening a window to the past, an opportunity to see what the people from history really looked like. So the face tells a direct story to the beholder, establishing an emotional and personal connection that text or written records can never accomplish.”

One of Nilsson’s Stone Age period subjects already graces an exhibit space at the Stonehenge Visitor Center near Salisbury, England. It is the reconstructed face of an early Neolithic man excavated in 1863 from a long barrow at Winterbourne Stoke, Wiltshire. Radiocarbon dated to between 3630 and 3660 BCE, analysis of his remains showed the man to be 25-40 years old with a slender build. He lived about 500 years before the circular ditch and banks, the first monuments at Stonehenge, were even built. Further analysis of his remains and the circumstances of his later Neolithic reburial indicated that he was a person of importance or high status. His connection to the Stonehenge culture is unknown, but it is clear that he was an elite member of a people who lived hundreds of years before the great monumental stones of Stonehenge were raised.

 

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Nilsson creates his pieces using 3-D models of the original skulls of his subjects, developing models by applying non-drying plasticine clay to recreate the muscles and tissues using traditional sculpting tools and then applying the finishing work on Acrystal molds of his resulting models. To do this accurately, Nilsson obtains information about the times and places in which the persons lived, the contexts and circumstances of the original skeletal finds, and detailed findings from the examining osteologists and forensic experts about the skulls of the individuals excavated or exhumed. The results, in addition to being astonishingly realistic, provide three dimensional likenesses of the individuals, something that cannot be realized even by typical artist depictions through two dimensional paintings.  

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Above: Nilsson puts the finishing touches on the reconstructed face of the ‘Stonehenge Man’. Explains Nilsson about the subject: “The grave was discovered in the late 19th century but the bones were recently the subject of extensive analysis and surveys. Some of the results from those analyses are amazing: He was born around 5,500 years ago well to the west or north west of the Stonehenge area, probably in what is today Wales, Devon or Brittany. At 2 years old he moved to the area near Stonehenge, and aged 9 he moved back to the west again. As he grew older his frequency of travel back and forth between those two places increased. How do we know all this? By analyzing the successive layers of the enamel in his teeth, isotopic values of strontium and oxygen reflected the sources of his drinking water.

He lived some time before the famous stone circle was built, but decades after his death, the mound of his grave was massively enlarged, one of the grandest known from Neolithic Britain. We also know from the analysis that he had a much higher percentage of meat and dairy products in his diet than would probably have been normal at the time. And he was taller than the average Neolithic man—172 cm compared to the average height, 165 cm. So, this was clearly a person of high status in his society.” Photo by Clare Kendall/English Heritage

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For more detailed information about Nilsson’s work, how he does it, and the other subjects he has reconstructed, see the feature article in the Fall issue of Popular Archaeology Magazine. 

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Image first from top, right: Nilsson working on a subject in his studio. Courtesy Oscar Nilsson

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peter sommer travels image

summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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The New Kid on the Block

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They were having the time of their lives. No other excavation had ever come close.

By the Spring of 2014 they had uncovered more than 1,550 bones representing at least 15 ancient individuals from a small, dark, nearly inaccessible chamber about 30 meters underground in the “Rising Star” cave system in South Africa. Long a caving destination for spelunkers, the Rising Star system is part of a complex of limestone caves near what is called the “Cradle of Humankind”, a World Heritage Site in Gauteng province well known for critical paleoanthropological discoveries of early humans. But at any level, this particular discovery was an extremely rare event. Designated as the “Dinaledi Chamber”, the finds within have gone on record as the largest single assemblage of hominin fossils in any one location in Africa.

The Expedition

The story of this discovery really began with two cavers, Rick Hunter and Steven Tucker, who found the entrance to the Dinaledi Chamber and discovered the fossils. The fossils were thought at the time to be the remains of a single individual. They showed pictures of the fossils to Pedro Boshoff, another caver and geologist. Recognizing the fossils as potentially significant, Boshoff alerted Professor Lee Berger of the University of the Witwatersrand, who then spearheaded the assembly of an expeditionary group (called the “Rising Star Expedition”) of scientists.*

On November 10, 2013 the first of these explorers entered the chamber, initiating the first of two expeditionary efforts, the first lasting about 21 days and the second, in early 2014, lasting about one week. Discovering very early that the cache of bones was far larger than they had ever imagined, in addition to being very difficult to reach, they realized that their task would not be an easy one. Carefully excavating the fossil elements with tools as delicate as toothpicks and brushes, they gently removed the fossils, piece by piece, and transported them up through the narrow 7.5-inch chute, including a second narrow area called the ‘superman’s crawl’ only 10 inches wide, to the surface. More than 60 cavers and scientists worked together in what Marina Elliott, one of the excavating scientists, described as “some of the most difficult and dangerous conditions ever encountered in the search for human origins”. Elliott was one of six women selected as “underground astronauts” from a global pool of candidates after Berger issued a call on social media for experienced scientist/cavers who could fit through the 18-centimeter cave opening. To facilitate safety, support and critical communication and observation of the excavation operation deep below, Berger employed efforts to design and install a network of safety lines, lights, cables and cameras to support the cave explorers and keep the senior scientists at the surface connected to their front-line “underground astronaut” scientists below. With the successful recovery of well over a thousand skeletal elements, the execution and results of the operation turned out to be far beyond anything they had ever expected.

Social media continued to play a role in the project, as the team shared expedition progress with a large public audience, schoolchildren and scientists. “This was a first in the history of the field,” said John Hawks, a paleoanthropologist with the University of Wisconsin-Madison who co-led the expedition and worked with Berger to design the media outreach.

The fossils were subsequently analyzed in a unique workshop in May 2014 funded by the South African DST/NRF, Wits University and National Geographic. More than 50 experienced scientists and early-career researchers came together to study and analyze the treasure trove of fossils and to compose scientific papers.

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Caver Steven Tucker squeezes through a narrow passage in the Rising Star cave. Tucker was one of the cavers on Lee Berger’s exploration team who found the chamber. The finds were announced by the University of the Witwatersrand, the National Geographic Society and the South African National Research Foundation and published in the journal eLife. Photo by Garrreth Bird

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 “Underground astronauts” Marina Elliott and Becca Peixotto work inside the cave where the fossils were discovered. The finds were announced by the University of the Witwatersrand, the National Geographic Society and the South African National Research Foundation and published in the journal eLife. Photo by Garrreth Bird

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Anthropologist Marina Elliott (left) and paleontologist Ashley Kruger working inside the cave system. National Geographic Explorer-in-Residence Lee Berger of the University of the Witwatersrand (pictured on the computer screen) led the expedition and followed the progress inside the cave from the surface. From the October issue of National Geographic magazine. Photo by Elliot Ross/National Geographic

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The “underground astronauts” (left to right): Becca Peixotto, Alia Gurtov, Elen Feuerriegel, Marina Elliott, K. Lindsay (Eaves) Hunter and Hannah Morris. The team of scientists excavated the chamber. The finds were announced by the University of the Witwatersrand, the National Geographic Society and the South African National Research Foundation and published in the journal eLife. Photo by John Hawks

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Berger’s Fortune

Even before the Rising Star expedition, Berger was no stranger to breakthrough discoveries. Several years before Rising Star was on his radar screen, he and his then 9-year-old son Matthew stumbled upon unprecedented finds at the fossil bearing site of Malapa, also in South Africa only 10 miles away from the Rising Star site. The finds consisted of remarkably complete skeletal remains as well as other well-preserved fauna and flora, instantly becoming some of the most intensely and thoroughly studied hominin fossils ever documented. Dominating science headlines when the news was first released, the discovery of more than 300 skeletal remains, including parts of skeletons still encased in rock, revealed a very ancient hominin candidate that sported a mosaic of features both ape-like and human—a 2-million-year-old hybrid called Australopithecus sediba (Au. sediba). The research team, led by Berger and composed of South African and international scientists from the Evolutionary Studies Institute (ESI) at the University of the Witwatersrand (Wits) and 16 other global institutions (totalling more than 100 researchers from around the world), examined the anatomy of Au. sediba based on its skeletons catalogued as “MH1” (a juvenile skeleton named “Karabo”)) and “MH2” (an adult female skeleton), as well as an adult isolated tibia catalogued as “MH4”. Dispersed among separate studies, the research determined, more than any other Australopithecus findings to date, the essence of how this hominin looked, walked, chewed and moved, complicating and changing perspectives on the evolution of the australopith forerunner genus in human ancestry. 

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The cranium of Malapa hominid 1 (MH1) from South Africa, named “Karabo”. The combined fossil remains of this juvenile male is designated as the holotype for Australopithecus sediba. Photo by Brett Eloff. Courtesy Lee Berger and Wits University.

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But as Berger would soon discover, Malapa would be relinquishing its crown to Rising Star………

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A new species

So what was this new Rising Star team of scientists looking at? Were they bones of the same species discovered years earlier at Malapa?

Preliminary analysis told them they were not.

Finally, after months of concerted, intense examination, they made their announcement on September 10, 2015……….and like the Malapa discovery, they concluded that what they had before them was an entirely new species of hominin. They called this one Homo naledi. And like Australopithecus sediba before, the combination of anatomical features was unlike any previously known species. 

“Overall, Homo naledi looks like one of the most primitive members of our genus, but it also has some surprisingly human-like features, enough to warrant placing it in the genus Homo,” said Hawks, who was also a senior author of the research paper describing the new species. “H. naledi had a tiny brain, about the size of an average orange, perched atop a very slender body.” The research shows that on average H. naledi stood approximately 1.5 meters (about 5 feet) tall and weighed about 45 kilograms (almost 100 pounds).

A gracile creature with a brain not much larger than a chimpanzee.

But this was no chimpanzee. This was something else. Something more human.

According to the examining scientists, this creature had teeth and skull features similar to those of the earliest-known members of our genus, such as Homo habilis. Certain key features of the hands, particularly the thumb, wrist and palm, suggested “tool-using capabilities”, according to Dr. Tracy Kivell of the University of Kent, U.K., a leading member of the team that studied H. naledi’s anatomy. And the feet were even more telling. Other than a few notable characteristics, they were “virtually indistinguishable from those of modern humans,” said Dr William Harcourt-Smith of Lehman College, City University of New York, and the American Museum of Natural History, who led the study of H. naledi’s feet. Its human-like ankles and feet, combined with its long lower limbs, he suggested, indicated that the species was well-suited for upright, long-distance walking—just like us. These were all trademark traits attributable to humans.

But there were clearly more “primitive”, ape-like traits, as well. The much smaller brain, for one. The shoulders were similar to those of apes, and like apes, the fingers of the hand had “extremely curved fingers, more curved than almost any other species of early hominin, which clearly demonstrates climbing capabilities,” said Kivell—features that facilitated a tree-climbing life. Moreover, this creature exhibited a short, ape-like torso and the pelvis resembled that of an Australopithecine, a more ape-like protohuman relative, fossils of which have now long been a part of the broad range of hominin finds in Africa.

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 From the eLife report: Holotype specimen of Homo naledi, Dinaledi Hominin 1 (DH1). Berger et al., 2015  http://elifesciences.org/lookup/doi/10.7554/eLife.09560.019

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Skeletal fossils of the hand of Homo naledi pictured in the Wits bone vault at the Evolutionary Studies Institute at the University of the Witwatersrand, Johannesburg, South Africa, on Sept. 13, 2014. The fossil hand is one of many fossils representing a new species of hominin. The broad thumb of Homo naledi suggests it was an expert climber. The Rising Star Expedition, a project that retrieved and analyzed the fossils was led in part by paleoanthropologist John Hawks, professor of anthropology at the University of Wisconsin-Madison. Photo by John Hawks/University of Wisconsin-Madison

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 Homo naledi foot.  Berger et al.,  http://elifesciences.org/content/4/e09560

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An ancient repository for the dead?

Perhaps most significantly, study of the context of the finds has led the researchers to conclude that H. naledi may have practiced a form of behavior previously thought to be unique to later humans. The fossils, consisting of infants, children, adults and elderly individuals, were found in a deep underground room that has “always been isolated from other chambers and never been open directly to the surface,” said Dr Paul Dirks of James Cook University in Queensland, Australia, lead author of the eLife paper on the context of the find. “What’s important for people to understand is that the remains were found practically alone in this remote chamber in the absence of any other major fossil animals.”

So remote was the space that out of more than 1,550 fossil elements recovered, only about a dozen are not hominin, and these few pieces are isolated mouse and bird remains, meaning that the chamber attracted few accidental visitors. The bones show no marks of scavengers or carnivores or any other signs that non-hominin agents or natural processes, such as moving water, carried these individuals into the chamber. Moreover, there was no evidence that the chamber was ever used as an actual living space by humans, and the age ranges of the skeletons fit the pattern of what archaeologists find in cemeteries. “We explored every alternative scenario, including mass death, an unknown carnivore, water transport from another location, or accidental death in a death trap, among others,” said Berger. “In examining every other option, we were left with intentional body disposal by Homo naledi as the most plausible scenario.” This suggests the possibility of a form of ‘ritualized’ behavior previously thought to be unique to humans (“ritualized” meaning repeated behavior.) “It seems probable that a group of hominins was returning to this place over a period of time and depositing bodies,” Hawks explains, adding that the supposition is akin to discovering similar behavior in chimpanzees. “It would be that surprising.” Furthermore, the way the bodies are arranged and their completeness suggests they were carried to the cave intact. “The bodies were not intentionally covered and we’re not talking about a religious ceremony, but something that was repeated and repeated in the same place. They clearly learned to do this and did it as a group over time. That’s cultural. Only humans and close relatives like Neandertals do anything like this.”

Still, there are remaining mysteries: Given that this deep, dark, isolated chamber likely could only be accessed with the aid of mobilized light sources, does this mean that this small-brained early human could control fire? And even though it is clearly feasible for small individuals to negotiate the narrow chutes to reach the chamber, could they have done this while carrying or managing a dead body to deposit into the chamber? We have now seen how difficult it is for a modern spelunker or scientist to reach the chamber, even without the burden of carrying or pulling a lifeless body. Why would these hominins have gone through so much trouble? 

According to the site investigators, there are more layers of deposition to excavate and many more bones to be recovered. Perhaps some answers are still hidden within the chamber. 

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dinaledichamber

Illustration of the geological and taphonomic context and distribution of fossils, sediments and flowstones within the Dinaledi Chamber. The distribution of the different geological units and flowstones is shown together with the inferred distribution of fossil material. The fossils came into the cave at the time of the deposition of the unit 1, 2 & 3 sediments via the chamber entrance at top right. Unit 1 represents early sediments which contain only some rodent fossils. Unit 2 represents sediments attached to side wall by flow stone, i.e. remnants of early deposits that do contain fossil bones of Homo naledi. Unit 3 represents rubble sediments containing most fossil bones. Paul H. G. M. Dirks et al., http://elifesciences.org/content/4/e09561

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The million dollar question: How old?

Now that scientists have discovered this new hominin species, what about the age?

Dating the finds has been problematic for a number of reasons. First, unlike other fossil deposits in caves, these fossils were found with very few or no fossils of other animals that could be directly associated with the finds, making it impossible, for now at least, to determine a faunal age. Secondly, the few flowstones in the cave that can be directly linked to the fossils are contaminated with clays, making them very difficult to date. Moreover, the fossils are contained in soft sediments that have been partly re-worked and re-deposited by acts of nature over time, making it extremely difficult to establish their primary stratigraphic position.

“We have tried three approaches that have failed to give dates for the actual fossils, and are currently working on further attempts,” report Berger and the scientific team. “Because of the uniqueness of the fossils and the situation in which they are found, we only want to publish age limits for them when we are absolutely sure that they are right.”

Thus the consensus at this point is that it is anybody’s guess. “They could have been there 2 million years ago or 100,000 years ago, possibly coexisting with modern humans,” said Hawks. 

One hope, says Hawks, is finding the remains of an animal that may have been a contemporary of Homo naledi. The fossils are embedded in a matrix of soft sediment and there are layers that remain unexcavated.

Nevertheless, given the geographic context with proximity to other already dated caves in the area, such as Sterkfontein, Swartkrans, and Malapa, the scientists suspect that the Dinaledi cave system may fall within the 2-to-3-million-year-old time range, possibly placing H. nadeli near or at the root of the genus Homo, considering the morphology. [To complicate the picture, however, one recent study conducted by researchers at Simon Frazer University suggests that Homo naledi may be about 912,000 years old, one million years younger than earlier speculations]. 

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H. naledi’s place in the human family 

Without a solid range of dates, the Rising Star scientists would likely be the first to say that any conclusions about where H. naledi falls within the human family universe would be tentative at best. Looking purely at the morphology, however, a number of skeletal features show clear markers that (many scientists agree) point to Homo. But combined with H. naledi’s significant ape-like characteristics, not the least of which is a small brain, a murky picture emerges. If indeed H. naledi is Homo, then, morphologically speaking, she could well stand at the cusp within the transition between the more ‘primitive’ Australopithecines and the more ‘human’ Homo genus species, such as Homo erectus.

But the first Homo?

Several hominin candidates have already been advanced for this honor by some scientists. Homo habilis is perhaps the best known. Dated generally within the range of 2.4 and 1.4 million years ago, fossil fragments of this species were first recovered by a team led by Louis and Mary Leakey in the early 1960’s at Olduvai Gorge, Tanzania. A few other habilis finds followed in different East African locations in the ensuing years. Featuring a slightly larger braincase and a smaller face and teeth, unlike an Australopithecus, but long arms and a prognathic facial form, like an Australopithecus, it appeared to straddle the line between the Homo and Australopithecine genus, with perhaps a tilt toward Homo. It was officially classified into the Homo genus, and touted by some as the first Homo. Not all scientists agree, however, and there are those who favor placing habilis squarely in the Australopithecine camp. 

Another very early fossil candidate, a mandible excavated by German paleoanthropologist Friedermann Shrenk at Uraha, Malawi in 1991, also featured clear signs of Homo. It was classified as belonging to the species Homo rudolfensis and, with a date of 2.4 million years, became the oldest known evidence for Homo, adding to some claims that the species coexisted with habilis as a contender for the earliest Homo throne. 

But the game changed again when, in January, 2013, Arizona State University’s Kaye E. Reed and colleagues unearthed a partial hominin mandible in the Ledi-Geraru area of the Afar region of Ethiopia. Pushing back the clock with a date of about 2.8 million years BP, it was a 8-cm.-long mandible with five intact teeth, representing the left side of a lower jaw. It revealed features such as slim molars, symmetrical premolars and an evenly proportioned jaw, characteristics that have distinguished species of the Homo lineage. Yet it also featured characteristics such as a more primitive, sloping chin morphology, similar to that of the Australopithecines. 

Homo or Australopithecus? These scientists suggest Homo.

“We have a jaw with teeth that preserves enough anatomy to be quite confident that it does represent an early part of the Homo lineage,” said team member William H. Kimbel of ASU’s Institute of Human Origins.  

The species? Not enough material to make such a decision, says Reed and her colleagues. But the find has implications for understanding that mysterious transitional period between Australopithecus and Homo

“There are relatively few fossils that can inform us about the origins of the genus Homo, said research team leader Brian Villmoare. “However, this is one of the most interesting periods in human evolution, because during this poorly-known period, humans made the important transition from the more ape-like Australopithecus to the more modern adaptive pattern seen in Homo.”

“We’re beginning to narrow the time,” added Kimbel, “not only as to the origin of the Homo lineage, which now predates 2.8 million, but to the time when it is likely that separate lineages of early Homo could have evolved…….the precise nature of the transition, for example whether it was a gradual transformation along a lineage, or a rapid divergence of lineages, or whether the early changes in the teeth and jaws were accompanied by changes in other systems, such as brain, or technology—these things are unknown still.”

And now we have H. naledi. But no dates.

Dating aside, however, the scientists have nevertheless reached some interesting suggestions about where H. naledi might fit into the picture of human evolution and how the evolutionary process has worked.

“We propose the testable hypothesis that the common ancestor of H. naledi, H. erectus, and H. sapiens shared humanlike manipulatory capabilities and terrestrial bipedality, with hands and feet like H. naledi, an australopith-like pelvis and the H. erectus-like aspects of cranial morphology that are found in H. naledi,” write the researchers in their report. Moreover, they continue, “enlarged brain size was evidently not a necessary prerequisite for the generally human-like aspects of manipulatory, locomotor, and masticatory morphology of H. naledi.”**

So what would be the implications in terms of their place in evolutionary history if reliable dating could be achieved?

“If the fossils prove to be substantially older than 2 million years, H. naledi would be the earliest example of our genus that is more than a single isolated fragment,” write the researchers. On the other hand, “a date younger than 1 million years ago would demonstrate the coexistence of multiple Homo morphs in Africa, including this small-brained form, into the later periods of human evolution.”**

Either scenario, according to Berger’s team, would be big news. 

But whether or not further study and testing reveals that H. naledi falls within that 2-to-3-million-old transitional time range, there is no doubt that the picture becomes all the more complex. The long list of questions about human evolution expands. 

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ledigerarumandible

Close-up view of the Ledi-Geraru partial mandible close to where it was sighted. Credit: Kaye Reed

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Going forward

Berger and his team conclude, as they did at the discovery of Australopithecus sediba in 2008, that there are clearly other key transitional forms of hominins that may yet be discovered and added to the fossil record. The developing picture, in other words, may be enormously complex, with the possibility of a multitude of various hominin species with different combinations of both “primitive” and “derived” (more modern) characteristics, inhabiting the same regions in overlapping periods of time and perhaps even interbreeding, creating what Berger has described as a “braided stream” through time to Home sapiens (modern humans), as opposed to the simpler, linear model advanced by earlier scientists. 

For now, much remains to be discovered in the Rising Star cave. “This chamber has not given up all of its secrets,” Berger said. “There are potentially hundreds if not thousands of remains of H. naledi still down there.”

According to Hawks, years of work remain at the site, including continuing analysis and documentation of all of the materials excavated. Plans, he says, include bringing many new technologies to bear on analyzing the fossils to help determine diet, rate of aging, and where they lived on the landscape. 

 

Readers can learn more about H. naledi in the detailed study reports in eLife, and by watching the video below.

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*Lee Berger of the Evolutionary Studies InstituteUniversity of the Witwatersrand (Wits University), led the international team of scientists under the joint sponsorship of Wits, the National Geographic Society, and the South African Department of Science and Technology/National Research Foundation.

**Lee R. Berger et al., Homo naledi, a new species of the genus Homo from the Dinaledi Chamber, South AfricaeLife 2015;4:e09560. DOI: 10.7554/eLife.09560. 

 

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natgeocover

The discovery was featured as the cover story of National Geographic magazine’s October 2015 issue The NOVA/National Geographic Special, “Dawn of Humanity,” premiered September 16, 2015, at 9 p.m. ET/8 p.m. CT on PBS in the United States and is streaming online now.

In the cover photo (left), paleoartist John Gurche used fossils from a South African cave to reconstruct the face of Homo naledi, the newest addition to the genus Homo. Photo by Mark Thiessen/National Geographic

See more videos about this discovery like the one shown in this article at PBS.org at  http://www.pbs.org/wgbh/nova/evolution/dawn-of-humanity.html.

The research was supported by Wits University, the National Geographic Society and South African DST/NRF. Ongoing exploration and conservation of the Rising Star site is supported by the Lyda Hill Foundation.

Portions of this article were adapted and edited from sections of subject press releases of the University of the Witwatersrand, New York University, and the University of Wisconsin, Madison.

Top image above: Campsite in South Africa where National Geographic Explorer-in-Residence Lee Berger of the University of Witwatersrand led an expedition to recover the remains of H. naledi, a new species of human relative. The find was announced by the University of the Witwatersrand, the National Geographic Society and the South African National Research Foundation and published in the journal eLife. Photo by Andrew Howley/National Geographic

Image, 7th from top, right: Lee Berger with the partial skeleton of Australopithecus sediba. Photo by Brett Eloff, courtesy Lee Berger and the University of the Witwatersrand.

Cover Image for this article: Photo by Mark Thiessen/National Geographic

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Human diet expanded 3.76 million years ago

Hominins (humans and their ancestors, and chimps and gorillas) expanded their diets as early as 3.76 million years ago to include foods based on plants that use the C4 photosynthetic pathway, a change that may have allowed them to survive in a wider range of environments than their ancestors, a study reports. Naomi Levin and colleagues used carbon isotope data from 152 fossil teeth of early humans, monkeys, and mammals in Ethiopia to refine the timing of the dietary expansion of early humans and the baboon, Theropithecus oswaldi. The dietary transition from foods based on plants that use the C3 photosynthetic pathway, which includes trees, shrubs, and cool season grasses, to those from plants that use the C4 or CAM pathways, such as warm season grasses and succulents, indicates a shift toward foods found in open landscapes. The authors found that C4 foods were a significant component of hominin and Theropithecus diets as early as 3.76 million years ago, during the early Pliocene. This dietary expansion occurred after major changes in teeth and jaw morphology in hominins, or early humans, whereas in the earliest members of the T. oswaldi lineage this dietary change preceded dental specialization for grazing. The study results have implications for early human evolution and dispersal, as the ability of early Pliocene hominins to eat a range of C3 and C4 foods may have enabled them to become generalists who could thrive in a wide variety of environments, the authors suggest.

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africansavannah

 The African savannah, which consists of mostly C4 type plants. Wikimedia Commons

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The details of the study* are published in the Proceedings of the National Academy of Science

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*“Dietary change among hominins and cercopithecids in Ethiopia during the early Pliocene,” by Naomi E. Levin et al.

This article was adapted and edited from the subject PNAS press release.

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Scientists Discover New Early Human Species

They were having the time of their lives.  

In late 2013 and early 2014 they uncovered more than 1,550 bones representing at least 15 ancient individuals from a small, dark, nearly inaccessible chamber in the “Rising Star” cave system in South Africa. Long a caving destination for spelunkers, the Rising Star system is part of a complex of limestone caves near what is called “The Cradle of Humankind,” a World Heritage Site in Gauteng province well known for critical paleoanthropological discoveries of early humans. But at any level, this particular discovery was an extremely rare event. Then, after meticulous analysis of the bones, this international team of scientists knew they had come across something remarkable. So remarkable, in fact, they decided to designate the bones as belonging to an entirely new species of hominin. They called it Homo naledi.

Designated as the “Dinaledi Chamber”, the finds within have gone on record as the largest single assemblage of hominin fossils in any one location in Africa. What’s more, “the combination of anatomical features in H. naledi distinguishes it from any previously known species,” said Lee Berger of the University of the Witwatersrand. Berger led the two expeditions* that discovered and recovered the fossils. “With almost every bone in the body represented multiple times, Homo naledi is already practically the best-known fossil member of our lineage.”

So what were these scientists looking at?

“Overall, Homo naledi looks like one of the most primitive members of our genus, but it also has some surprisingly human-like features, enough to warrant placing it in the genus Homo,” said John Hawks of the University of Wisconsin-Madison, U.S., an expedition participant and a senior author of the research paper describing the new species. “H. naledi had a tiny brain, about the size of an average orange (about 500 cubic centimeters), perched atop a very slender body.” The research shows that on average H. naledi stood approximately 1.5 meters (about 5 feet) tall and weighed about 45 kilograms (almost 100 pounds).

A gracile creature with a brain not much larger than a chimpanzee.

But this was no chimpanzee. This was something else. Something more human.

According to the examining scientists, this creature had teeth and skull features similar to those of the earliest-known members of our genus, such as Homo habilis. Certain key features of the hands suggested “tool-using capabilities”, according to Dr. Tracy Kivell of the University of Kent, U.K., who was part of the team that studied H. naledi’s anatomy. And the feet were even more telling. Other than a few notable characteristics, they were “virtually indistinguishable from those of modern humans,” said Dr William Harcourt-Smith of Lehman College, City University of New York, and the American Museum of Natural History, who led the study of H. naledi’s feet. Its feet, combined with its long legs, he suggested, indicated that the species was well-suited for upright, long-distance walking—just like us. These were all trademark traits attributable to humans.

But there were clearly more “primitive”, ape-like traits, as well. The much smaller brain, for one. The shoulders were much more similar to those of apes, and like apes, the fingers of the hand had “extremely curved fingers, more curved than almost any other species of early hominin, which clearly demonstrates climbing capabilities,” said Kivell—features that facilitated a tree-climbing life. Moreover, this creature exhibited a short, ape-like torso and the pelvis resembled that of an Australopithecine, a more ape-like protohuman relative, fossils of which have now long been a part of the broad range of hominin finds in Africa to date.

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MM8345_FirstHuman



Anthropologist Marina Elliott (left) and paleontologist Ashley Kruger explore a side chamber in the Rising Star cave where more than 1,500 fossil elements of a new species, Homo naledi, were discovered. Elliott was one of six scientists, described as “underground astronauts,” with the skill and physique to reach the remote chamber. National Geographic Explorer-in-Residence Lee Berger of the University of the Witwatersrand (pictured on the computer screen) led the expedition and followed the progress inside the cave from the surface. Photo by Elliot Ross/National Geographic

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naledi5

The braincase of a composite male skull of H. naledi measures just 560 cubic centimeters in volume — less than half that of the modern human skull pictured behind it. The fossils were recovered from the Rising Star cave in South Africa by a team led by National Geographic Explorer-in-Residence Lee Berger of the University of the Witwatersrand. Art: Stefan Fichtel. Sources: Lee Berger and Peter Schmid, Wits; John Hawks, University of Wisconsin-Madison/National Geographic

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naledipicstringer

 Homo naledi skull compared to those of other Homo species. Chris Stringer, Wikimedia Commons

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Hawks_Homo_naledi15_22

Skeletal fossils of the hand of Homo naledi pictured in the Wits bone vault at the Evolutionary Studies Institute at the University of the Witwatersrand, Johannesburg, South Africa, on Sept. 13, 2014. The fossil hand is one of many fossils representing a new species of hominin. The broad thumb of Homo naledi suggests it was an expert climber. The Rising Star Expedition, a project that retrieved and analyzed the fossils was led in part by paleoanthropologist John Hawks, professor of anthropology at the University of Wisconsin-Madison. Photo by John Hawks/University of Wisconsin-Madison

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naledi6

A composite skeleton of H. naledi is surrounded by some of the hundreds of other fossil elements recovered from the Dinaledi Chamber in the Rising Star cave in South Africa. The expedition team was led by National Geographic Explorer-in-Residence Lee Berger of the University of the Witwatersrand. Photo by Robert Clark/National Geographic; Source: Lee Berger, Wits, photographed at Evolutionary Studies Institute

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naledi1

A reconstruction of Homo naledi’s head by paleoartist John Gurche, who spent some 700 hours recreating the head from bone scans. Photo by Mark Thiessen/National Geographic

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An ancient depository for the dead?

Perhaps most significantly, study of the context of the finds has led the researchers to conclude that H. naledi may have practiced a form of behavior previously thought to be unique to humans. The fossils, consisting of infants, children, adults and elderly individuals, were found in a deep underground room that has “always been isolated from other chambers and never been open directly to the surface,” said Dr Paul Dirks of James Cook University in Queensland, Australia, lead author of the eLife paper on the context of the find. “What’s important for people to understand is that the remains were found practically alone in this remote chamber in the absence of any other major fossil animals.”

So remote was the space that out of more than 1,550 fossil elements recovered, only about a dozen are not hominin, and these few pieces are isolated mouse and bird remains, meaning that the chamber attracted few accidental visitors. The bones show no marks of scavengers or carnivores or any other signs that non-hominin agents or natural processes, such as moving water, carried these individuals into the chamber. Moreover, there was no evidence that the chamber was ever used as an actual living space by humans, and the age ranges of the skeletons fit the pattern of what archaeologists find in cemeteries. “We explored every alternative scenario, including mass death, an unknown carnivore, water transport from another location, or accidental death in a death trap, among others,” said Berger. “In examining every other option, we were left with intentional body disposal by Homo naledi as the most plausible scenario.” This suggests the possibility of a form of ‘ritualized’ behavior previously thought to be unique to humans (“ritualized” meaning repeated behavior.) “It seems probable that a group of hominins was returning to this place over a period of time and depositing bodies,” Hawks explains, adding that the supposition is akin to discovering similar behavior in chimpanzees. “It would be that surprising.” Furthermore, the way the bodies are arranged and their completeness suggests they were carried to the cave intact. “The bodies were not intentionally covered and we’re not talking about a religious ceremony, but something that was repeated and repeated in the same place. They clearly learned to do this and did it as a group over time. That’s cultural. Only humans and close relatives like Neandertals do anything like this.”

The million dollar question: How old?

Now that scientists have discovered this new hominin species, what about the age?

Dating the finds have been problematic for a number of reasons. First, unlike other fossil deposits in caves, these fossils were found with very few or no fossils of other animals that could be directly associated with the finds, making it impossible to determine a faunal age. Secondly, the few flowstones in the cave that can be directly linked to the fossils are contaminated with clays, making them very difficult to date. Moreover, the fossils are contained in soft sediments that have been partly re-worked and re-deposited by acts of nature over time, making it extremely difficult to establish their primary stratigraphic position.

“We have tried three approaches that have failed to give dates for the actual fossils, and are currently working on further attempts,” report Berger and the scientific team. “Because of the uniqueness of the fossils and the situation in which they are found, we only want to publish age limits for them when we are absolutely sure that they are right.”

Thus the consensus at this point is that it is anybody’s guess. “They could have been there 2 million years ago or 100,000 years ago, possibly coexisting with modern humans,” said Hawks. 

One hope, says Hawks, is finding the remains of an animal that may have been a contemporary of Homo naledi. The fossils are embedded in a matrix of soft sediment and there are layers that remain unexcavated.

Nevertheless, given the geographic context with proximity to other already dated caves in the area, such as Sterkfontein, Swartkrans, and Malapa, the scientists suspect that the Dinaledi cave system may fall within the 2-to-3-million-year-old time range, possibly placing H. nadeli near or at the root of the genus Homo, considering the morphology. But at this point, it would be an educated guess.

The Expeditions

The story of this discovery really began with two cavers, Rick Hunter and Steven Tucker, who found the entrance to the Dinaledi Chamber and discovered the fossils. The fossils were thought at the time to be the remains of a single individual. They showed pictures of the fossils to Pedro Boshoff, another caver and geologist. Recognizing the fossils as potentially significant, Boshoff alerted Professor Lee Berger, who then spearheaded the assembly of an expeditionary group (called the “Rising Star Expedition”) of scientists.

On November 10, 2013 the first of these explorers entered the chamber, initiating the first of two expeditionary efforts, the first lasting about 21 days and the second, in early 2014, lasting about one week. The task was not an easy one. Carefully excavating the fossil elements with tools as delicate as toothpicks and brushes, they gently removed the fossils, piece by piece, and transported them up through the narrow 7.5-inch chute, including a second narrow area called the ‘superman’s crawl’ only 10 inches wide, to the surface. More than 60 cavers and scientists worked together in what Marina Elliott, one of the excavating scientists, described as “some of the most difficult and dangerous conditions ever encountered in the search for human origins”. Elliott was one of six women selected as “underground astronauts” from a global pool of candidates after Berger issued a call on social media for experienced scientist/cavers who could fit through the 18-centimeter cave opening. Social media continued to play a role in the project, as the team shared expedition progress with a large public audience, schoolchildren and scientists. “This was a first in the history of the field,” said Hawks, who worked with Berger to design the media outreach.

The fossils were subsequently analyzed in a unique workshop in May 2014 funded by the South African DST/NRF, Wits University and National Geographic. More than 50 experienced scientists and early-career researchers came together to study and analyze the treasure trove of fossils and to compose scientific papers.

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naledi2

 

A cross-section showing the Dinaledi chamber within the Rising Star cave near Johannesburg, South Africa, where the fossils of a new species, Homo naledi, were discovered. A team of six “underground astronauts” navigated the extremely narrow chutes to recover more than 1,500 fossil elements discovered in the cave. Jason Treat, National Geographic, Source: Lee Berger, Wits

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hnaledi6

Caver Steven Tucker squeezes through a narrow passage in the Rising Star cave. Tucker was one of the cavers on Lee Berger’s exploration team who found the chamber where H. naledi, a new species of human relative, was discovered. Photo by Garrreth Bird

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hnaledi7

“Underground astronauts” Marina Elliott and Becca Peixotto work inside the cave where fossils of H. naledi, a new species of human relative, were discovered. Photo by Garrreth Bird

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hnaledi4

The “underground astronauts” (left to right): Becca Peixotto, Alia Gurtov, Elen Feuerriegel, Marina Elliott, K. Lindsay (Eaves) Hunter and Hannah Morris. The team of scientists excavated the chamber where H. naledi, a new species of human relative, was discovered. Photo by John Hawks

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Going forward

Berger and his team conclude, as they did at the discovery of Australopithecus sediba in 2008, that there are clearly other key transitional forms of hominins that may yet be discovered and added to the fossil record.  H. naledi is joining an expanding mosaic of hominin species on an ancient African landscape. The developing picture, in other words, may be becoming enormously complex, with the possibility of a multitude of various hominin species inhabiting the same regions and perhaps even interbreeding, creating what Berger has described as a “braided stream” through time to Home sapiens (modern humans), as opposed to the traditional, linear model advanced by earlier scientists. And as more evidence emerges, more questions are raised.   

For now, much remains to be discovered in the Rising Star cave alone. “This chamber has not given up all of its secrets,” Berger said. “There are potentially hundreds if not thousands of remains of H. naledi still down there.”

According to Hawks, years of work remain at the site, including continuing analysis and documentation of all of the materials excavated. Plans, he says, include bringing many new technologies to bear on analyzing the fossils to help determine diet, rate of aging, and where they lived on the landscape. 

Readers can find out more in the detailed study reports in eLife.

___________________________________________

*Lee Berger of the Evolutionary Studies InstituteUniversity of the Witwatersrand (Wits University), led the international team of scientists under the joint sponsorship of Wits, the National Geographic Society, and the South African Department of Science and Technology/National Research Foundation

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natgeocover

The discovery is featured as the cover story of National Geographic magazine’s October 2015 issue, available online now and on print newsstands starting September 29, 2015. The NOVA/National Geographic Special, “Dawn of Humanity,” premieres September 16, 2015, at 9 p.m. ET/8 p.m. CT on PBS in the United States and is streaming online now. The program will air outside of the United States later in September. You can follow the conversation using #NalediFossils. 

See more videos about this discovery like the one shown in this article at PBS.org at  http://www.pbs.org/wgbh/nova/evolution/dawn-of-humanity.html

The research was supported by Wits University, the National Geographic Society and South African DST/NRF. Ongoing exploration and conservation of the Rising Star site is supported by the Lyda Hill Foundation.

Portions of this article were adapted and edited from sections of subject press releases of the University of the Witwatersrand, New York University, and the University of Wisconsin, Madison.

Cover Image for this article: Photo by Mark Thiessen/National Geographic

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Cod bones from Mary Rose reveal globalized fish trade in Tudor England

UNIVERSITY OF CAMBRIDGE— New stable isotope and ancient DNA analysis of the bones of stored cod provisions recovered from the wreck of the Tudor warship Mary Rose, which sank off the coast of southern England in 1545, has revealed that the fish in the ship’s stores had been caught in surprisingly distant waters: the northern North Sea and the fishing grounds of Iceland – despite England having well developed local fisheries by the 16th century.

Test results from one of the sample bones has led archaeologists to suspect that some of the stored cod came from as far away as Newfoundland in eastern Canada.

The research team say that the findings show how naval provisioning played an important role in the early expansion of the fish trade overseas, and how that expansion helped fuel the growth of the English navy. Commercial exploitation of fish and the growth of naval sea power were “mutually reinforcing aspects of globalisation” in Renaissance Europe, they say.

“The findings contribute to the idea that the demand for preserved fish was exceeding the supply that local English and Irish fisheries were able to provide in order to feed growing – and increasingly urban – populations. We know from these bones that one of the sources of demand was naval provisions,” said Dr James Barrett, from the McDonald Institute for Archaeological Research at the University of Cambridge.

“The existence and development of globalised fisheries was one of the things that made the growth of the navy possible. The navy was a key mechanism of maritime expansion, while at the same time being sustained by that expansion. The story of the cod trade is a microcosm of globalisation during this pivotal period that marked the beginning of an organised English navy, which would go on to become the Royal Navy,” he said.

The study, led by researchers from the universities of Cambridge, Hull and York, is published today in the open access journal Royal Society Open Science.

Built in 1510, the Mary Rose was one of the most famous ships in England, a former flagship of Henry VIII’s fleet, when it mysteriously heeled over and sank in the Solent channel during a battle with an invading French fleet in 1545, taking almost all of its crew – over 400 men – down with it, as well as a full store of provisions. Rediscovered in the 1970s and raised in 1982, the remains are an extraordinary time capsule of naval life during the Tudor period.

Among the remains of the ship’s supplies were thousands of bones from dried or salted cod from casks and baskets – staples of Tudor naval diet. The researchers took a small selection of eleven bones from the various different holds of the ship, and analysed them using two techniques: stable isotope analysis, which reflects the diet and environmental conditions of the fish based on the bone’s protein chemistry, and ancient DNA analysis, which reflects genetic drift, gene flow and natural selection.

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These are cod bones (cleithra) recovered from the Mary Rose, with a stained modern example for comparison. Credit: Sheila Hamilton-Dyer

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These are cod bones (vertebrae) recovered from the Mary Rose. Credit: Sheila Hamilton-Dyer

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Separately, the techniques gave very broad answers, but when cross-referenced with each other and the historical record they provided researchers with increasingly reliable evidence for which waters the cod had been fished from almost 500 years ago.

The best indication for three of the samples was that they were fished in the northern North Sea, possibly the Scottish Northern Isles, where there were known fisheries that produced dried cod preserved in salt.

Another seven of the samples probably came from waters off the cost of Iceland. Due to the cold and dry climate, many Icelanders preserved cod by air-drying it during winter months, a product known as ‘stockfish’, which was frequently traded with the English. English fishermen also worked Icelandic waters themselves, to produce salt cod. At the time, England to Iceland was a three to six month round trip, usually departing in spring and returning in early autumn after a season of trade and/or fishing.

One bone sample appeared to have come from the other side of the Atlantic. While not definitive, the most likely evidence pointed to Newfoundland, an island off the northeast Canadian coast famous for its historical cod fishery. While such distances for fishing may seem surprising for the time, James Barrett says that – as the English Newfoundland fishery had begun in 1502, in the wake of John Cabot’s exploratory voyage of 1497 – this is entirely plausible. French, Spanish and Portuguese fishermen also took advantage of this new source of cod.

“At the time of the Mary Rose in 1545, Newfoundland was a small-scale seasonal fishery where mariners went to fish and then come home. Within a century the Newfoundland fishery had become a major economic concern, of greater value than the fur trade, for example,” said Barrett.

“The need for fish stocks was an important driver of involvement in north-eastern North America. The fish trade was one of the key links in the causal chain of European expansion to that continent,” he said. A typical outbound journey time from England to Newfoundland was around five weeks.

Records from just after the time of the Mary Rose show that a standard daily ration of preserved cod was a quarter of a fish served with ship biscuit, two ounces of butter and a gallon of beer. This was dished up three times a week. The bone samples show that these fish could range from approximately 70cm to over a metre in length, so a quarter of cod was a significant portion. “Preserved cod was great value for money as a provision, particularly as space and durability were an issue on board a ship,” said Barrett.

Before the reign of Henry VIII, another driver for the cod fisheries was the fact that fish was a suitable food during Christian fasts such as Lent as an alternative to milk and cheese, and, as Barrett points out, “urban populations didn’t have room for cows in their back yards”.

Once Henry VIII split from the church and the Reformation was ushered in, religious associations with meals of fish started to dissipate, threatening to send England’s fisheries, and subsequently its navy, into decline.

Thus Elizabeth I, Henry’s successor, instigated weekly ‘fish days’ to encourage domestic consumption and consequently a commercial fleet to not only help feed the navy but also ensure a supply of mariners to help run it when needed.

“The importance of ‘victualling’ the navy continued to grow in the seventeenth century, most famously during the Restoration when its administration was systematized under Samuel Pepys,” said Barrett.

“Military sea power was a prerequisite for the concurrent – and subsequent – development of England’s sea-borne colonialism. Yet by sourcing the cod bones from the Mary Rose, we see that the navy itself was first sustained, in part, by fishermen working distant northern and transatlantic waters,” he said.

Arguably the most challenging aspect of the research was creating the historical context, the ‘base map’, for the researchers to compare their Mary Rose specimens to. Due to chemical pollution of the world’s oceans over the last few hundred years, and changes in the genetic structure of cod populations due to fishing pressures and climate change, the team had to find and use ancient cod bones for their study’s comparison controls, as modern cod bones would have been useless.

“Thankfully, when making dried cod, part of the process was chopping the head off,” said Barrett. “This meant we could use skull bones from archaeological sites to get both genetic and isotopic signatures for all these regions. The lion’s share of the work was finding and analysing the over 300 control samples.”

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Source: Subject press release of the University of Cambridge.

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Common ancestor to humans and chimps described

An analysis of fossil shoulder blades from early human species finds that the last ancestor shared in common between humans and chimpanzees was similar to a modern African ape. Relatively little is known about the earliest members of the human lineage because fossils from this period are rare, rendering it difficult to reconstruct the anatomical and behavioral changes that occurred during human evolution. Nathan Young and colleagues used 3D shape measurements of the shoulder blade to test alternative evolutionary hypotheses about the last common ancestor. The authors found that the best-supported explanation is that the human shoulder gradually evolved from being African ape-like to its modern form. Contrary to earlier studies, this finding suggests that gorillas and chimpanzees have changed little in the past 6-7 million years, while the human lineage has evolved considerably. The change in shoulder shape during human evolution is consistent with reduced use of the arms for climbing in trees and an increased reliance on throwing and using tools, the authors suggest. The fossil evidence suggests that this shift to living on the ground happened slowly, and that for the majority of human evolutionary history, human ancestors continued to use trees to find food and retreat from predators, according to the authors.

The detailed study* is published in the Proceedings of the National Academy of Sciences.

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354915_0_figure_5587169_ntdy1t_1440082197

Above: A hypothesized model of shoulder shape evolution from African ape-like (top left) to modern human (bottom right) including predicted ancestral forms (grey) and hominin fossils: Australopithecus afarensis (DIK 1-1 developmental simulation, top right), Australopithecus sediba (MH2, middle left), Homo ergaster (KNM WT15000, middle right), Homo neanderthalensis (Kebara 2, bottom middle). The increasingly inferior orientation of the spine (purple) is consistent with a history of sustained and gradual selection for reduced arboreality and increased tool use in the human lineage. Image courtesy of Nathan Young.

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*“Fossil hominin shoulders support an African ape-like last common ancestor of humans and chimpanzees,” by Nathan M. Young et al., Proceedings of the National Academy of Sciences, 7 September 2015.

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summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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Researchers map early American caffeine trade

Villagers residing in a swath of land stretching from southern Colorado to northern Chihuahua, Mexico, consumed caffeinated drinks beginning as early as A.D. 750, according to a study. In the years since archaeologists discovered cacao residues in ceramics from Chaco Canyon, New Mexico, researchers have questioned the time depth and geographic extent of cacao exchange between populations in the pre-Hispanic US Southwest/Mexican Northwest and Mesoamerica. Patricia Crown and colleagues used a combination of liquid chromatography and mass spectrometry to analyze organic residues present in 177 ceramic samples recovered from 18 sites in Arizona, Chihuahua, Colorado, and New Mexico. The findings reveal that villagers residing in a swath of land stretching from southern Colorado to northern Chihuahua consumed caffeinated drinks beginning as early as A.D. 750 and extending to at least A.D. 1400. The analysis identified traces of caffeine, theobromine, and theophylline, which are components of stimulant drinks that were most likely concocted from either cacao or holly leaves and twigs. The stimulant drinks were likely consumed during ceremonial occasions rather than on an everyday basis, similar to practices by other North and South American populations during that time. According to the authors, the findings may shed light on relations and trade between geographically distant North American populations.

Details of the study* are published in the Proceedings of the National Academy of Sciences.

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caffeinetrade

Fourmile Polychrome flowerpot-shaped vessel from Grasshopper Pueblo*. 

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*“Ritual drinks in the pre-Hispanic US Southwest and Mexican Northwest,” by Patricia L. Crown et al., Proceedings of the National Academy of Sciences, 7 September 2015.

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summer2015ebookcover3This richly illustrated ebook version of a recent Popular Archaeology issue includes the following stories: The discovery of the tomb of a previously unknown pharaoh that is shedding light on a lost ancient Egyptian dynasty; how genetics is revolutionizing what we know about human evolution and our prehistoric past; one scholar’s controversial ‘New Chronology’ and how it supports the historicity of the biblical Exodus; how archaeologists are unearthing new history in Williamsburg, Virginia, a seat of British colonial power in 18th century America; the discovery of the remains of a major Roman legionary base in Israel; the unearthing of an ancient Judean fortified settlement in the borderlands between the biblical kingdoms of ancient Judah and the Philistines; and how archaeologists are uncovering evidence of what may have been an important administrative center of Judah during the 8th century BCE. Now available from Amazon.com!

 

  







 

 

 

 

 

 

 

 

 

 

 

 

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