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Early farmers exploited the honeybee at least 8,500 years ago

UNIVERSITY OF BRISTOL —Humans have been exploiting bees as far back as the Stone Age, according to new research from the University of Bristol published in Nature today.

Previous evidence from prehistoric rock art is inferred to show honey hunters and Pharaonic Egyptian murals show early scenes of beekeeping. However, the close association between early farmers and the honeybee remained uncertain.

This study has gathered together evidence for the presence of beeswax in the pottery vessels of the first farmers of Europe by investigating chemical components trapped in the clay fabric of more than 6,000 potsherds from over 150 Old World archaeological sites.

The distinctive chemical ‘fingerprint’ of beeswax was detected at multiple Neolithic sites across Europe indicating just how widespread the association between humans and honeybees was in prehistoric times. For example, beeswax was detected in cooking pots from an archaeological site in Turkey, dating to the seventh millennium BC – the oldest evidence yet for the use of bee products by Neolithic farmers.

The paper* brings together over 20 years of research carried out at Bristol’s Organic Geochemistry Unit (School of Chemistry) led by Professor Richard Evershed. Co-authors of the paper include archaeologists involved in the large scale investigation of sites across Europe, the Near East and Northern Africa.

Dr Mélanie Roffet-Salque, lead author of the paper, said: “The most obvious reason for exploiting the honeybee would be for honey, as this would have been a rare sweetener for prehistoric people. However, beeswax could have been used in its own right for various technological, ritual, cosmetic and medicinal purposes, for example, to waterproof porous ceramic vessels.”

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The exploitation of honeybees for their products is known from the ancient Egyptian record, but association with early farmers during Neolithic times has been uncertain. Waugsberg, Wikimedia Commons

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The lack of evidence for beeswax use at Neolithic sites above the 57th parallel North as in Scotland and Fennoscandia points to an ecological limit to the natural occurrence of honeybees at that time.

Professor Evershed said: “The lack of a fossil record of the honeybee means it’s ecologically invisible for most of the past 10,000 years. Although evidence from ancient Egyptian murals and prehistoric rock art suggests mankind’s association with the honeybee dates back over thousands of years, when and where this association emerged has been unknown – until now.

“Our study is the first to provide unequivocal evidence, based solely on a chemical ‘fingerprint’, for the palaeoecological distribution of an economically and culturally important animal. It shows widespread exploitation of the honeybee by early farmers and pushes back the chronology of human-honeybee association to substantially earlier dates.”

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*’Widespread Exploitation of the Honeybee by Early Neolithic Farmers’ by Roffet-Salque et al in Nature

Source: University of Bristol news release.

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 This richly illustrated issue includes the following stories: Two remarkable discoveries that are shedding light on human beginnings in Africa; a traveling exhibit and an archaeological site that show how knowledge is more valuable than gold; a Spanish cave and a unique burial that are offering a tantalizing glimpse on the lives of Ice Age hunter-gatherers in Europe; the stunning visual reconstruction of an ancient Roman town; enlightening new finds at a remarkably well-preserved site of ancient Hellenistic-Roman culture overlooking the Sea of Galilee; rare finds that are shedding light on occult practices among ancient Greeks in Sicily; and an overview of the overwhelmingly rich archaeological heritage of Britain. Find it on Amazon.com.

 

 

  

 

 

 

 

 

Plague infected humans much earlier than previously thought

CELL PRESS—Plague infections were common in humans 3,300 years earlier than the historical record suggests, reports a study published in Cell. By sequencing the DNA of tooth samples from Bronze Age individuals from Europe and Asia, the researchers discovered evidence of plague infections roughly 4,800 years ago. But it was at least another thousand years until the bacterium that causes the disease, Yersinia pestis, acquired key changes in virulence genes, allowing it to spread via fleas and evade the host immune system.

“We found that the Y. pestis lineage originated and was widespread much earlier than previously thought, and we narrowed the time window as to when it developed,” says senior study author Eske Willerslev of the Center for GeoGenetics, University of Copenhagen. “This study changes our view of when and how plaque influenced human populations and opens new avenues for studying the evolution of diseases.”

Y. pestis was the notorious culprit behind the sixth century’s Plague of Justinian, the Black Death, which killed 30%-50% of the European population in the mid-1300s, and the Third Pandemic, which emerged in China in the 1850s. Earlier putative plagues, such as the Plague of Athens nearly 2,500 years ago and the second century’s Antonine Plague, have been linked to the decline of Classical Greece and the undermining of the Roman army. However, it has been unclear whether Y. pestis could have been responsible for these early epidemics because direct molecular evidence for this bacterium has not been obtained from skeletal material older than 1,500 years.

Based on their recent work, Willerslev, Kristian Kristiansen of the University of Gothenburg, and their collaborators suspected that the plague could have shaped human populations much earlier than previously thought. A few months ago, they published a high-profile population genomics study of Eurasian individuals from the Bronze Age (c. 3000 BC to 1500 BC), which they showed was a highly dynamic period involving large-scale migrations and population replacements that were responsible for shaping major parts of present-day demographic structure in both Europe and Asia.

But the reason for these migrations was not clear. “One of the scenarios we discussed was the idea that large epidemics could have facilitated such dynamics,” says study co-first author Morten Allentoft of the Center for GeoGenetics, University of Copenhagen. “Perhaps people were migrating to get away from epidemics or re-colonizing new areas where epidemics had decimated the local populations. Could it be, for example, that plague was present in humans already in these prehistoric times?”

To answer this question, the researchers screened 89 billion raw DNA sequence reads obtained from the teeth of 101 Bronze Age individuals from Europe and Asia. These teeth were obtained from various museums and archaeological excavations. They discovered Y. pestis DNA in seven of these individuals, whose teeth were dated between 2794 BC and 951 BC (early Iron Age). Evolutionary analysis revealed that the most recent common ancestor of all known Y. pestis strains is 5,783 years old–thousands of years older than previous estimates.

Moreover, Y. pestis genomes from the Bronze Age lacked a gene called Yersinia murine toxin (ymt), which is known to protect the pathogen inside the flea gut and thereby enable the spread of plague to humans via an insect vector. However, this gene was present in the Y. pestis genome from the Iron Age individual, suggesting that plague became transmissible by fleas between approximately 3,700 and 3,000 years ago. This new finding conflicts with previous studies suggesting that the ymt gene was acquired early in Y. pestis evolution due to its importance in the pathogen’s life cycle.

Besides widespread transmission through fleas, another secret to Y. pestis‘ success has been its stealthy evasion of the host immune system. In mammals, the immune system has evolved to recognize and mount protective responses against a protein called flagellin, which is the principal component of the flagella–the whip-like appendage that helps bacteria move around. In all previously known Y. pestis strains, a mutation in the flhD gene has prevented the expression of the flagellin protein.

However, this mutation was not present in the two oldest Bronze Age individuals, and the flagella system was still in the process of devolving in the youngest Bronze Age individual. Taken together, the findings suggest that Y. pestis did not fully adapt as a flea-borne mammalian pathogen until the beginning of the first millennium BC, giving rise to the historically recorded plagues.

“The underlying evolutionary mechanisms that facilitated the evolution of Y. pestis are still present today, and learning from this will help us understand how future pathogens may arise or develop increased virulence,” says co-first study author Simon Rasmussen of the Technical University of Denmark. “Additionally, our study changes the historical understanding of this extremely important human pathogen and makes it possible that other so-called plagues, such as the Plague of Athens and the Antonine Plague, could have been caused by Y. pestis.”

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The photo shows a Bronze Age human skull from the Yamnaya culture painted with red ochre. Yamnaya later developed into the Afanasievo culture of Central Asia, one of the cultures that carried the early strains of Y. pestisCredit: Rasmussen et al./Cell 2015

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In future studies, the researchers will look for evidence of plague in other geographic regions and time periods to get a better grasp of the history of this disease. They will also search for ancient DNA remains of other blood-borne bacteria and viruses. “Our findings reveal that one can find ancient pathogenic microbes in ancient human material showing no obvious morphological signs of disease,” Willerslev says. “So plague is just one disease to look at, and one could explore all kinds of diseases like this in the future.”

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This project was funded by the European Research Council, the Marie Curie Actions of the European Union, the Villum Foundation, the University of Copenhagen, the Danish National Research Foundation, and The Lundbeck Foundation.

Cell, Rasmussen and Allentoft et al.: “Early Divergent Strains of Yersinia pestis in Eurasia 5,000 Years Ago” http://dx.doi.org/10.1016/j.cell.2015.10.009

Source: Cell Press news release

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summer2015ebookcover3

 This richly illustrated issue includes the following stories: Two remarkable discoveries that are shedding light on human beginnings in Africa; a traveling exhibit and an archaeological site that show how knowledge is more valuable than gold; a Spanish cave and a unique burial that are offering a tantalizing glimpse on the lives of Ice Age hunter-gatherers in Europe; the stunning visual reconstruction of an ancient Roman town; enlightening new finds at a remarkably well-preserved site of ancient Hellenistic-Roman culture overlooking the Sea of Galilee; rare finds that are shedding light on occult practices among ancient Greeks in Sicily; and an overview of the overwhelmingly rich archaeological heritage of Britain. Find it on Amazon.com.

 

 

  

 

 

 

 

 

Earliest church in the tropics unearthed in former heart of Atlantic slave trade

UNIVERSITY OF CAMBRIDGE —Archaeologists from the University of Cambridge have unearthed the earliest known European Christian church in the tropics on one of the Cabo Verde islands, 500km off the coast of West Africa, where the Portuguese established a stronghold to start the first commerce with Africa south of the Sahara. This turned into a global trade in African slaves from the 16th century, in which Cabo Verde played a central part as a major trans-shipment centre.

The earliest remains of the church of Nossa Senhora da Conceição date from around 1470, with a further larger construction dating from 1500. Extensions and a re-cladding of the church with tiles imported from Lisbon have also been documented.

This church is the oldest formal European colonial building yet discovered in sub-Saharan Africa, say researchers. It was found amongst the ruins of Cidade Velha, the former capital of Cabo Verde, which at its height was the second richest city in the Portuguese empire; a city that channelled slavery for almost 300 years.

“It’s a profound social and political story to which these new archaeological investigations are making an invaluable contribution,” said Cambridge’s Professor Marie Louise Stig Sørensen.

Archaeologists from the University and the Cambridge Archaeological Unit (CAU) have just completed the excavation and conservation of this building for public display, and have been working with the Cabo Verde government and local partners on the town’s archaeology since 2007.

“We’ve managed to recover the entire footprint-plan of the church, including its vestry, side-chapel and porch, and it now presents a really striking monument,” said Christopher Evans, Director of the CAU.

“Evidently constructed around 1500, the most complicated portion is the east-end’s chancel where the main altar stood, and which has seen much rebuilding due to seasonal flash-flood damage. Though the chancel’s sequence proved complicated to disentangle, under it all we exposed a gothic-style chapel,” he said.

“This had been built as a free-standing structure prior to the church itself and is now the earliest known building on the islands – the whole exercise has been a tremendous success.”

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The site of the excavation of the earliest church yet discovered in sub-Saharan Africa, with some of the structure dating back to the late 15th century. Credit: Cambridge Archaeological Unit

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During the excavation several tombstones of local dignitaries were recovered. One enormous stone found in the side chapel belonged to Fernão Fiel de Lugo, a slaver and the town’s ‘treasure holder’ between 1542 and 1557. “This is a place of immense cultural and heritage value. This excavation has revealed the tombs and graves of people that we only know from history books and always felt could be fiction,” Cidade Velha’s Mayor, Dr Manuel Monteiro de Pina, said.

The research team discovered a densely packed cemetery dug into the floor of the church, which they say will be of great importance for future academic investigations. It is estimated that more than 1,000 people were buried here before 1525, providing a capsule of the first 50 years of colonial life on the island.

Preliminary analysis of samples shows that about half the bodies are African, with the rest from various parts of Europe. An excavation is being planned to collect data for isotope analysis of more bodies to learn more about the country’s founding population and its early slave history.

“From historical texts we have learned about the development of a ‘Creole’ society at an early date with land inherited by people of mixed race who could also hold official positions. The human remains give us the opportunity to test this representation of the first people in Cabo Verde,” said Evans.

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 These are some of the tombstones of Portuguese slavers revealed by the excavation. Credit: Cambridge Archaeological Unit

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The significance of the discovery, a central feature of the Cidade Velha UNESCO World Heritage Site, has been widely acknowledged. Hundreds of people have visited the site since work began, and school groups have frequently been brought out to see the church. On his visit, the President Jorge Carlos Fonseca endorsed the contribution made by this project. “I can see the importance the site has for Cabo Verde to understand our history and our identity,” he said.

“The hope is that the work will both encourage much-needed cultural tourism, and help the nation build a more nuanced sense of its notable past,” said Sørensen.

The ten small islands that make up Cabo Verde are harsh volcanic rock, and were barren of people, mammals and trees until the Portuguese arrived in 1456. The Portuguese transformed the islands into one of the major hubs for the transatlantic slave trade, bringing with them crops, livestock and people in the form of traders, missionaries and thousands upon thousands of slaves. The slaves were funnelled through the islands where they were ‘sorted’ and sold before being shipped off to plantations across the Atlantic World.

The discovery of Brazil, in particular, and the establishment of plantations there, caused trade through Cabo Verde to explode. “The islands were a focal point for the initial wave of globalisation, all built on the back of the slave trade,” said Sørensen. “The excavation reveals these global connections as the finds include fine ware and faience from Portugal, German stoneware, Chinese porcelain and pottery from different parts of West Africa.”

In addition to the excavated church, there were around 22 other churches in the small river valley where the old town of Cidade Velha sits, including a large cathedral built with imported Portuguese stones. It is clear the church had huge influence here – a mere 15 degrees north of the equator – from the late medieval period onwards, say the researchers.

Centuries later, pirate attacks plagued the islands. French privateer Jacques Cassard launched a devastating attack on Cidade Velha in 1712, from which it would never recover, and, as slavery began to be outlawed during the 19th century, the islands lost their financial basis and were neglected by the Portuguese. The islanders were left to the mercy of an inhospitable landscape with erratic rainfall that undermined agricultural activities and caused drinking water to be scarce.

Cabo Verde became a republic in 1975, and as an independent nation it is coming to terms with a heritage and identity rooted in slavery. The research team believe the new archaeological discoveries will prove integral to this process.

“Cabo Verde is a young nation in many ways, and it needs its history to be unearthed and accessed so it can continue to build its national identity,” said Sørensen.

Evans added: “The finds so far clearly demonstrate the fantastic potentials of Cabo Verde’s archaeology and the contribution they can make to the future of these Atlantic islands.”

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This image shows Christopher Evans from the Cambridge Archaeological Unit on site with members of the excavation team. Credit: Cambridge Archaeological Unit

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 Source: University of Cambridge news release.

 

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Read more in-depth articles about archaeology with a premium subscription to Popular Archaeology Magazine. 

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Travel and learn with Far Horizons.

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summer2015ebookcover3

 This richly illustrated issue includes the following stories: Two remarkable discoveries that are shedding light on human beginnings in Africa; a traveling exhibit and an archaeological site that show how knowledge is more valuable than gold; a Spanish cave and a unique burial that are offering a tantalizing glimpse on the lives of Ice Age hunter-gatherers in Europe; the stunning visual reconstruction of an ancient Roman town; enlightening new finds at a remarkably well-preserved site of ancient Hellenistic-Roman culture overlooking the Sea of Galilee; rare finds that are shedding light on occult practices among ancient Greeks in Sicily; and an overview of the overwhelmingly rich archaeological heritage of Britain. Find it on Amazon.com.

 

 

  

 

 

 

 

 

A Sneak Peek at What’s Ahead

 

Picture96croppedStay tuned for the upcoming Winter 2015 issue of Popular Archaeology, to be released in December. Among the exciting premium feature topics for this issue:

1. Archaeologists are unearthing the unwritten story of America’s first English colony. New evidence for the whereabouts of at least some of its lost colonists may be emerging.

2. The tomb of a Mycenaean warrior and its sensational contents open a window on Mycenaean Greece before the sack of Troy.

3. The incredibly preserved finds of the “Pompeii of the Ancient Maya” provide an unprecedented glimpse into the lives of the other 90 percent. 

4. Wailing at the wrong wall? The strange case of the incredible shrinking Fortress Antonia: A new interpretation of the Temple Mount area in Jerusalem may give clues to the Roman fortress that was downsized by tradition and the true location of the Jerusalem temple of Jesus’ time.

5. The intrepid journeys of an archaeologist reveal the face of ancient Tibet’s first great civilization. 

6. And more to come……….

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Read more in-depth articles about archaeology with a premium subscription to Popular Archaeology Magazine. 

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 ______________________________________________

Travel and learn with Far Horizons.

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summer2015ebookcover3

 This richly illustrated issue includes the following stories: Two remarkable discoveries that are shedding light on human beginnings in Africa; a traveling exhibit and an archaeological site that show how knowledge is more valuable than gold; a Spanish cave and a unique burial that are offering a tantalizing glimpse on the lives of Ice Age hunter-gatherers in Europe; the stunning visual reconstruction of an ancient Roman town; enlightening new finds at a remarkably well-preserved site of ancient Hellenistic-Roman culture overlooking the Sea of Galilee; rare finds that are shedding light on occult practices among ancient Greeks in Sicily; and an overview of the overwhelmingly rich archaeological heritage of Britain. Find it on Amazon.com.

 

 

  

 

 

 

 

 

 

New map shows how drought affected 1,000 years of history

The long history of severe droughts across Europe and the Mediterranean has largely been told through historical documents and ancient journals, each chronicling the impact in a geographically restricted area. Now, for the first time, an atlas based on scientific evidence provides the big picture, using tree rings to map the reach and severity of dry and wet periods across Europe, and parts of North Africa and the Middle East, year to year over the past 2,000 years.

Together with two previous drought atlases covering North America and Asia, the Old World Drought Atlas significantly adds to the historical picture of long-term climate variability over the Northern Hemisphere. In so doing, it should help climate scientists pinpoint causes of drought and extreme rainfall in the past, and identify patterns that could lead to better climate model projections for the future. A paper describing the new atlas, coauthored by scientists from 40 institutions, appears today in the journal Science Advances.

“The Old World Drought Atlas fills a major geographic gap in the data that’s important to determine patterns of climate variability back in time,” said Edward Cook, cofounder of the Tree Ring Lab at Columbia University’s Lamont-Doherty Earth Observatory, and leader of all three drought-atlas projects. “That’s important for understanding causes of megadroughts, and it’s important for climate modelers to test hypotheses of climate forcing and change.”

For example, if Europe had a wet year north of the Alps and a dry year to the south, that provides clues to circulation patterns and suggests influence from the North Atlantic Oscillation, one of the primary sources of climate variability affecting patterns in Europe. “You can’t get that from one spot on a map,” Cook said. “That’s the differentiator between the atlas and all these wonderful historic records – the records don’t give you the broad-scale patterns.”

The new atlas could also improve understanding of climate phenomena like the Atlantic Multi-decadal Oscillation, a variation in North Atlantic sea-surface temperatures that hasn’t been tracked long enough to tell if it is a transitory event, forced by human intervention in the climate system, or a natural long-term oscillation. By combining the Old World Drought Atlas with the Asia and North America atlases, climatologists and climate modelers may also discover other sources of internal climate variability that are leading to drought and wetness across the Northern Hemisphere, Cook said.

In the Science Advances paper, Cook and his coauthors compare results from the new atlas and its counterparts across three time spans: the generally warm Medieval Climate Anomaly (1000-1200); the Little Ice Age (1550-1750); and the modern period (1850-2012).

The atlases together show persistently drier-than-average conditions across north-central Europe over the past 1,000 years, and a history of megadroughts in the Northern Hemisphere that lasted longer during the Medieval Climate Anomaly than they did during the 20th century. But there is little understanding as to why, the authors write. Climate models have had difficulty reproducing megadroughts of the past, indicating something may be missing in their representation of the climate system, Cook said.

The drought atlases provide a much deeper understanding of natural climate processes than scientists have had to date, said Richard Seager, a coauthor of the paper and a climate modeler at Lamont-Doherty Earth Observatory.

“Climate variability tends to occur within patterns that span the globe, creating wet conditions somewhere and dry conditions somewhere else,” said Seager. “By having tree ring-based hydroclimate reconstructions for three northern hemisphere continents, we can now easily see these patterns and identify the responsible modes of variability.”

The hemispheric scale adds to the potential uses of what was already the gold standard of paleo-hydroclimate research, said Sloan Coats, a climate dynamicist at the University of Colorado who studies megadroughts using the atlases. “The fact that the drought atlases provide a nearly hemispheric view of hydroclimate variability provides an incredible amount of information that can be used to better understand what was happening in the atmosphere and ocean,” Coats said.

In Europe and the Mediterranean, the new drought atlas expands scientists’ understanding of climate conditions during historic famines.

For instance, an unusually cold winter and spring are often blamed for a 1740-1741 famine in Ireland. The Old World Drought Atlas points to another contributor: rainfall well below normal during the spring and summer of 1741, the authors write in the paper. The atlas shows how the drought spread across Ireland, England and Wales.

The atlas also tracks the reach of the great European famine of 1315-1317, when historical documents describe how excessive precipitation across much of the continent made growing food nearly impossible. The atlas tracks the hydroclimate across Europe and shows its yearly progressions from 1314 to 1317 in detail, including highlighting drier conditions in southern Italy, which largely escaped the crisis.

The atlas may also help shed light on more recent phenomena, including a record 2006-2010 drought in the Levant that a recent Lamont study suggests may have helped spark the ongoing Syrian civil war.

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Maps from a new 2,000-year drought atlas show rainfall conditions over the whole continent, and much of the Mediterranean. A chart for 1741 shows severe drought (brown areas) running from Ireland into central Europe and beyond. A chart for the year 1315 shows the opposite problem — too much rain (dark green areas), which made farming almost impossible. Credit: Cook et al., Science Advances, 2015

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The North America atlas, published in 2004, has been used by other researchers to suggest that a series of droughts starting around 900 years ago may have contributed to the eventual collapse of native cultures. Likewise, the Asia atlas, published in 2010, has led researchers to connect droughts, at least in part, to the fall of Cambodia’s Angkor culture in the 1300s, and China’s Ming dynasty in the 1600s.

The tree ring data used to create the new atlas included cores from both living trees and timbers found in ancient construction reaching back more than 2,000 years. They come from 106 regional tree ring chronologies, each with dozens to thousands of trees, and were contributed to the project by the International Tree Ring Data Bank and European tree-ring scientists.

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The paper, “Old World Megadroughts and pluvials during the Common Era,” is published in Science Advances: 202-326-6440 

Cover image, top left: Numerous droughts have hit European agriculture over the ages, but their overall extent has been known mainly only from scattered historical documents. Here, an English calendar page, circa 1310, shows men harvesting wheat. Credit: Queen Mary’s Psalter, Wikimedia commons

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Read more in-depth articles about archaeology with a premium subscription to Popular Archaeology Magazine. 

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Travel and learn with Far Horizons.

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summer2015ebookcover3

 This richly illustrated issue includes the following stories: Two remarkable discoveries that are shedding light on human beginnings in Africa; a traveling exhibit and an archaeological site that show how knowledge is more valuable than gold; a Spanish cave and a unique burial that are offering a tantalizing glimpse on the lives of Ice Age hunter-gatherers in Europe; the stunning visual reconstruction of an ancient Roman town; enlightening new finds at a remarkably well-preserved site of ancient Hellenistic-Roman culture overlooking the Sea of Galilee; rare finds that are shedding light on occult practices among ancient Greeks in Sicily; and an overview of the overwhelmingly rich archaeological heritage of Britain. Find it on Amazon.com.

 

 

  

 

 

 

 

 

Remarkably preserved ancient Maya village reveals daily life

University of Colorado, Boulder and National Science Foundation—Continuing research at a Maya village in El Salvador—frozen in time by a blanket of volcanic ash from 1,400 years ago—shows farming families who lived there went about their daily lives with virtually no strong-arming by the elite royalty lording over the valley.

Instead, archaeological evidence indicates significant interactions at the village of Ceren took place among families, village elders, craftspeople and specialty maintenance workers. This research comes from a new University of Colorado Boulder (CU-Boulder) study, funded by the National Science Foundation (NSF).

Ceren is the best-preserved ancient Maya village in all of Latin America. In A.D. 660, the village was blasted by toxic gas, pummeled by lava bombs and then choked by a 17-foot layer of ash falling over several days after the Loma Caldera volcano, less than half a mile away, erupted.

Discovered in 1978 by CU-Boulder anthropology Professor Payson Sheets, Ceren has been called the “New World Pompeii.” The degree of preservation is so great researchers can see marks of finger swipes in ceramic bowls, and human footprints in gardens that host ghostly ash casts of corn stalks. Researchers have also uncovered thatched roofs, woven blankets and bean-filled pots.

Some Maya archaeological records document “top-down” societies, where the elite class made most political and economic decisions, at times exacting tribute or labor from villages, said Sheets. But at Ceren, the villagers appear to have had free reign regarding their architecture, crop choices, religious activities and economics.

“This is the first clear window anyone has had on the daily activities and the quality of life of Maya commoners back then,” said Sheets, who is directing the excavation. “At Ceren we found virtually no influence and certainly no control by the elites.”

A paper on the subject appears in the current issue of Latin American Antiquity published by the Society for American Archaeology. The 10-acre Ceren research area was declared a UNESCO World Heritage Site in 1993.

Ceren is believed to have been home to about 200 people. Researchers have excavated 12 buildings, including living quarters, storehouses, workshops, kitchens, religious buildings and a community sauna. There are dozens of unexcavated structures, and perhaps even another settlement or two under the Loma Caldera volcanic ash, which covers an area of roughly two square miles, Sheets said. Thus far, no bodies have been found, an indication a precursor earthquake may have given residents a running start just before the eruption.

The only relationship Ceren commoners had with Maya elite was indirect, through public marketplace transactions in El Salvador’s Zapotitan Valley. There, Ceren farmers likely swapped surplus crops or crafts for coveted specialty items like jade axes, obsidian knives and colorfully decorated polychrome pots, all of which elites arranged to have brought to market from a distance. Virtually every Ceren household had a jade axe–which is harder than steel–used for tree cutting, building and woodworking.

“The Ceren people could have chosen to do business at about a dozen different marketplaces in the region,” said Sheets. “If they thought the elites were charging too much at one marketplace, they were free to vote with their feet and go to another.”

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Professor Payson Sheets points to the imprint of several toes from a footprint left on the Ceren sacbe. Footprints pointed away from the village and may have been made by Mayans fleeing the volcanic eruption.  Credit Rachel Egan, University of Colorado.

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One of the excavated community buildings has two large benches in the front room, which Sheets believes were used by village elders when making decisions. One decision would have involved organizing the annual crop harvest festival, a celebratory eating and drinking ritual that appears to have been underway at Ceren when the Loma Caldera volcano abruptly blew just north of the village, said Sheets.

He believes the villagers fled south, perhaps along a white road leading away from the village discovered under 15 feet of ash in 2011. The elevated road, known as a sacbe (SOCK-bay), is about 2 meters wide and made from white tightly packed volcanic ash, with drainage ditches along each edge. The sacbe appears to split in the village and lead toward the plaza and two religious structures: the large ceremonial building and a second, smaller structure used by a female shaman.

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Structures at Ceren were buried in up to 17 feet of ash over a period of several days, freezing the 1,400-year-old village in time. Credit: University of Colorado

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Unique research

“There are two aspects that make this project unique,” said John Yellen, NSF program manager for the Ceren excavations. “The first is the incredible degree of preservation at Ceren, which captures in such detail a moment in time. The second is the perseverance and ingenuity of Dr. Sheets, who devised effective techniques to address a broad range of questions involving Ceren’s agricultural practices and its social organization.”

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Prior to the discovery of Ceren’s sacbe, such “white way” roads—which often connected temples, plazas and towns and had strong practical, political and spiritual connotations—were known only from Mexico’s Yucatan Peninsula and all were lined on each side with paving stones, unlike the Ceren sacbe, said Sheets. (A portion is pictured above right, buried under about 16 feet of ash. The trench on the left side was a drainage canal to catch excess rainwater).

Measurements with an instrument known as a penetrometer indicated the sacbe was extraordinarily hard. This was, in part, because villagers must have vigorously pounded sections of the sacbe with heavy objects over a period of days, he said. In addition, tiny, angular grains of the ash, or tephra used to build the sacbe lock together in a tight matrix when packed down under moist conditions. The center of the sacbe was slightly grooved, an indication people walked single file as they headed to their crop fields or perhaps traveled to and from the nearby town of San Andres.

“The western canal of the sacbe was crisp and well formed and had apparently been worked on just days before the eruption,” said Sheets. “But it looks like the workers hadn’t gotten around to maintaining the eastern canal before the volcanic event.”

The team, which has dug 10 test pits so far in an attempt to trace the path of the sacbe from Ceren south, found several dozen footprints on its outer, softer edges. “More than half of the footprints were headed south away from the village, away from the danger,” Sheets said. “I think at least some of them were left by people fleeing the eruption.”

Who built and maintained the sacbe—now known to stretch at least 150 meters from the village and may well go all the way to San Andres—is still a mystery. “We think the work was done on the household level with multiple families involved, perhaps supervised by village elders,” said Sheets.

There also is evidence that residents of particular households at Ceren were responsible for the upkeep of certain community structures, said Sheets. One household, for example, contained an inordinate amount of pots and firewood that the researchers speculated were used during activities in the domed community sauna building. That sweat bath, which could comfortably seat about a dozen people, had a central firebox where water was poured to create the desired steam and heat, Sheets said.

In 2009, Sheets and his team discovered intensively cultivated manioc (cassava) fields at Ceren. It was the first and only evidence of intense manioc cultivation at any New World archaeology site. Sheets and others believe such large manioc crops could have played a vital role in feeding indigenous societies living throughout tropical Latin America. Today, dried manioc powder is used in the region to make tortillas and tamales, and fermented manioc is used to make alcoholic beverages.

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Co-authors on the new study included doctoral students Rachel Egan and Alexandria Halmbalcher of CU-Boulder, former CU-Boulder doctoral student Christine Dixon (now a faculty member at Green River College in Auburn, Washington); professor David Lentz and doctoral student Venecia Slotten from the University of Cincinnati; Rocio Herrera of National Museum of Anthropology in San Salvador; and doctoral student Celine Lamb of the University of Kentucky.

CU-Boulder undergraduates and graduate students have been involved in all aspects of the Ceren excavation, which likely will continue for decades. The first vestiges of the site were inadvertently uncovered in 1976 by a bulldozer, leveling ground for a government agricultural project. Sheets began research on the site two years later after radiocarbon dates led him to conclude the buried village was ancient.

In addition to NSF, Sheets and his colleagues have collaborated with the National Geographic Society, the Smithsonian Institution, the Getty Conservation Institute and a number of universities.

Source: National Science Foundation and University of Colorado, Boulder. All images courtesy University of Colorado.

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Paleolithic humans in Europe dealt with saber-toothed cats, study shows

Any artist-created images you may have seen depicting prehistoric humans hunting or fighting with saber-toothed cats may not represent a scene very far from reality about 300,000 years ago when Lower Paleolithic humans actually did share the same environment with the big cats in what is present-day Europe.

According to scientists who have studied remains unearthed at the archaeological site of Schöningen in north-central Germany, the wooden spear-making humans who lived in the region of the site had up-close-and-personal contact with the European saber-toothed cat (Homotherium latidens) about 300,000 years ago. Whether they interacted with the big cats as their predators (hunter) or as defenders (the hunted), is still open to question and debate.

The clues come from their examination of five fossil teeth and one fossil humerus identified as representing two saber-toothed cats, found within the context of the finds unearthed at the famous Schöningen site, where, in addition to other items, archaeologists recovered a number of wooden spears, one lance, a double pointed stick, and a burnt stick dating to the Holsteinian, c. 300 kyr. 

“The humerus is a unique specimen; it shows evidence of hominin impacts and use as a percussor,” reported the researchers in their report abstract, the full study of which is now published and available online as an article in press in the Journal of Human Evolution. “The Homotherium remains from Schöningen are the best documented finds of this species in an archaeological setting and they are amongst the youngest specimens of Homotherium in Europe,” the researchers added.*  

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Spear no. 8 at Schöningen in situ. P. Pfarr NLD, Wikimedia Commons 

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The study of the finds has implications for understanding the relationship between these Paleolithic humans and the carnivores who lived within the same ecological context. “The presence of this species as a carnivore competitor would certainly have impacted the lives of late Middle Pleistocene hominins,” the researchers concluded. “The discovery illustrates the possible day-to-day challenges that the Schöningen hominins would have faced and suggests that the wooden spears were not necessarily only used for hunting, but possibly also as a weapon for self-defense.”*

The Paleolithic site of Schöningen is best known for the earliest known, completely preserved wooden weapons or artifacts uncovered there by archaeologists under the direction of Dr. Hartmut Thieme between 1994 and 1998 at an open-cast lignite mine. Deposited in organic sediments at a former lakeshore, they were found in combination with the remains of about 16,000 animal bones, including 20 wild horses, whose bones featured numerous butchery marks, including one pelvis that still had a spear protruding from it. The finds are considered evidence that early humans were active hunters with specialized tool kits as early as 300,000 or more years ago.

The saber-toothed cat fossil study was conducted by Jordi Serangeli of the Institute for Archaeological Sciences, University of Tübingen, and colleagues from other institutions, who also authored the recently published paper.

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*Jordi Serangeli, et al., The European saber-toothed cat (Homotherium latidens) found in the “Spear Horizon” at Schöningen (Germany), Journal of Human Evolution, 23 October 2015. 

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Beyond the temples, ancient bones reveal the lives of the Mayan working class

UNIVERSITY OF FLORIDA—Most of what we know about Mayan civilization relates to kings, queens and their elaborate temples. To understand what life was like for the 99 percent, one researcher turned to ancient animal bones stored at the Florida Museum of Natural History.

Ashley Sharpe, a doctoral student at the museum on the UF campus, says the picture researchers have painted of the Maya people isn’t broad enough.

“When you think about the Romans and the Greeks, we know a lot about all of the different social classes — from the Caesars down to the commoners — but although there were tens of thousands of middle-class and lower-income Maya in big cities, we still don’t know much about the everyday lives of most people.”

For the first time in Maya archaeology research, 22,000 animal remains at the museum, one of the largest collections of its kind outside of Central America, were used as clues about life in the Maya lower classes. The bones revealed that the civilization known for its art and astronomy also had political and economic systems that were more complex than previously thought – systems similar to modern societies. The details are described in a new study appearing online this month in the Journal of Anthropological Archaeology.

“We looked at how the Maya acquired and distributed animal resources in order to learn more about the economy and how the royal, elite and lower classes interacted,” said Sharpe, who has either lived in or made frequent trips to the Maya region since 2008. “It turns out, the Maya states and classes were not all homogenous. They had complicated systems in place for trade relations, distribution of food and access to species, which varied among the cities and social classes much like they do today.”

Sharpe and co-author Kitty Emery, Florida Museum associate curator of environmental archaeology, examined the animal remains recovered from the ruins of three Maya city-states in Guatemala, including the famous site of Aguateca that was burned after a surprise enemy attack which resulted in a level of preservation similar to the Roman ruins of Pompeii.

Sharpe traced the movement of animals and their resources from trade partners to Aguateca and the capitals of Piedras Negras and Yaxchilan. She also followed the flow of resources between royalty, the rich and the poor at the capital cities and to the less powerful surrounding villages.

“The Maya used animals for things like hides, tools, jewelry and musical instruments, but they were also vitally important as emblems of status, royalty and the symbolic world of the gods, and thus often were prime resources jealously guarded by the rich and powerful,” Emery said.

Surprisingly, however, study researchers found that middle-ranking elites used the widest variety of animals. Royalty and other high-ranking elites focused on a select group of symbolic and prestigious animals like jaguars and crocodiles, Sharpe said.

“We had expected that the elites would have the highest diversity but that was not the case,” she said. “The elites ate animals that were considered delicacies, sort of the way people in our own upper class eat things like caviar, but the rest of us think it’s kind of gross.”

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Temple Seigeur, Aguateca. Wikimedia Commons

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Sharpe said poor villagers mostly ate fish and shellfish from rivers near their homes. However, both the poor and middle-elite classes living at the capitals kept a wider variety of animals for themselves than they shared with the surrounding villages, particularly more species from deep inside forests and from the ocean, which was 50 to 100 miles away. At Aguateca, more than 100 miles from the nearest coast, thousands of marine shells were found covering the floors of ancient households and craft workshops.

“These people didn’t have pack animals like in the Old World where they had horses and donkeys to carry goods,” Sharpe said. “They were literally carrying things on their backs from the sea. They did have rivers to help with transportation, but not a lot of rivers, and on land they also had the jungle to contend with.”

At Yaxchilan, more than half of the skeletons found were deer, suggesting residents primarily relied on nearby forests, including the deer that fed on their corn fields. However, much like in medieval Britain, there is evidence the Maya may have regulated hunting and fishing, creating more of a divide in access to animal resources among the classes, Sharpe said. At each of the three cities, elites, middle and lower classes all had access to different types of species, both imported marine resources as well as animals that could be obtained from nearby forests and rivers, she said.

The differences in predominate species, such as marine animals and deer, show the city-states likely had different trade partners, which Sharpe said makes sense because we know there were, at times, hostilities between the cities. The differences could also point to unique cultural identities, she said. For example, the residents of Aguateca were known for their jewelry made from shells.

“This is the first time we’re seeing this sort of evidence for what the middle and lower classes were doing,” Sharpe said.

Archaeologists have been working amid dense jungle to understand how the many Maya city-states functioned since the early 20th century. They have raised questions about how states cooperated, or didn’t, with one another, how much control and interaction state capitals had with their subordinate villages, and how the various social classes differed, Sharpe said.

Sharpe and Emery decided to analyze animal bones to begin answering these questions because animal resources played such a vital role in the politics and economy of the Late Classic Maya civilization (A.D. 500-900), Emery said. But buried beneath the jungle floor in Guatemala are enough mysteries to fill Sharpe’s entire career.

“It almost doesn’t matter where you dig in the jungle near these centers, you hit paved limestone floor. It gives you the sense that at one time, the entire place was deforested and it was a massive city,” she said. “When you travel to these capitals, you drive over unexcavated mounds that were once people’s houses — people we know little or nothing about.”

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Source: University of Florida press release.

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Early humans linked to ancient Australian extinction

SOCIETY OF VERTEBRATE PALEONTOLOGY—While the anthropogenic impact on global species diversity is clear, the role of ancient human populations in causing extinctions is more controversial. New data presented at the Society of Vertebrate Paleontology meetings in Dallas, Texas, implicates early humans in the extinction of large mammals, birds and lizards in Australia. More precise dating of these extinction events places them 10 thousand years after the first arrival of humans in Australia, suggesting human predation was the most likely cause.

Australia was once home to a plethora of large-bodied animals, including a huge monitor lizard, large terrestrial birds, a giant wombat, the marsupial lion, and giant kangaroos. Sometime during the last ice age this once-abundant ‘megafauna’ disappeared. Though this extinction roughly coincides with the first arrival of humans to Australia, their direct role has been hotly debated, as some research has claimed that humans arrived after some of the animals were already extinct.

To shed light on this controversial issue, paleontologist John Alroy, of Macquarie University, New South Wales, and colleagues, set out to more precisely estimate the timing of the Australian megafaunal extinctions. Alroy explains “There’s been a lengthy, sometimes heated debate about whether human hunting or other impacts caused the huge mass extinction of large terrestrial vertebrates in Australia during the last glacial period.”

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 Reconstruction of an extinct marsupial lion within the Victoria Cave in Australia. Wikimedia Commons

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Alroy dated over 200 fossils by measuring the levels of radioactive carbon in their bones. Precisely estimating when a species went extinct is difficult because there are gaps in the fossil record. To overcome this problem, Alroy estimated the likely time-range during which the extinction occurred based on the age of the most recent fossil. He found that the megafauna disappeared between 27 and 40 thousand years ago. Using a similar method, he estimated that the first humans arrived between 50 and 61 thousand years ago. This confidently puts humans on Australia when the megafaunal extinctions occurred.

The timings also suggest that there was a ten thousand year lag between the first appearance of humans and their impact on the megafauna. Alroy and colleagues suggest that this delay could relate to the time taken for humans to spread across Australia, or for the technology of early populations to advance enough to hunt large prey.

These findings not only highlight the long-term impact of humans in Australia, but also support patterns seen elsewhere, explains Alroy, “The results are also important because they’re consistent with evidence that human hunting caused major extinctions later on in North and South America, in addition to relatively recent extinctions on many islands (such as the loss of moas in New Zealand).”

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Source: Press release of the Society of Vertebrate Paleontology

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Pre-contact Amazonian natives had little impact on land, new research finds

FLORIDA INSTITUTE OF TECHNOLOGY—New research led by Florida Institute of Technology shows that the impacts of indigenous people prior to European contact impacted riverside forests, but that such impacts were largely limited to an area within a day’s walk from a river.

The findings by the international team of archaeobotanists, paleoecologists and ecologists will be published online in the paper “Anthropogenic influence on Amazonian forests in prehistory: An ecological perspective” on Oct. 28 in the Journal of Biogeography.

The new research, conducted using plant fossils, estimates of mammal density, remote sensing and human population modeling, reinforces that Amazonian forests may be very vulnerable to disturbance by logging , mining and other large enterprises. The study refutes an emerging theory from some archaeologists and anthropologists that Amazonian rain forests are the result of ancient managed landscapes – a notion that undermines the ecological view of these forests as fragile ecosystems.

“Nobody doubts the importance of human actions along the major waterways,” said Mark Bush, professor of biological sciences at the Florida Institute of Technology and the lead author of the paper. “But whether humans had a greater impact on the ecosystem than any other large mammal has yet to be established in much of western Amazonia.”

Dolores Piperno, curator of archaeobotany and South American archaeology at the American Museum of Natural History and co-author of the study, said the recent emphasis on Amazonia as a manufactured and domesticated landscape overstates the facts.

“At nearly the size of the continental United States, Amazonia is a vast landscape with considerable biotic and abiotic heterogeneity. Extrapolations being made from relatively few archaeological sites mainly located along water courses as to the overall effect of prehistoric human occupation must be tempered in the face of available and yet-to-be-accumulated empirical data.”

“This is not a debate solely about what happened over 500 years ago,” Bush added. “The implications are very relevant to modern society and conservation.”

He said if the forests were heavily modified prior to European arrival and have regrown in just over one tree generation to such a vast level of biodiversity, this rapid recovery could be used as a justification to log forests aggressively. If, however, humans had a very limited influence, as their findings have shown, then logging and other major disturbances would have long-lasting, possibly irreversible, consequences on the forest.

“This distinction becomes increasingly important as policy makers decide whether to enforce or relax protections of areas already designated as parks, including the Yasuni of Ecuador and protected areas in Brazil,” said Bush, who has spent almost 30 years conducting research in the Amazon.

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This is a false-color satellite image of a western Amazonian river showing abandoned ox-bow channels and ox-bow lakes where the river has meandered in its floodplain. Beyond the limit of the ox-bows is the terra firme forest. A new study finds the impact of people living near rivers on the surrounding land is less than earlier theories had suggested. Credit: Florida Institute of Technology

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The study is also relevant in shaping our understanding of the extent to which the Amazon Basin might offset carbon dioxide produced in industrialized areas. The young forest implied by the man-made-disturbance scenario leads to a large potential for further uptake of carbon, helping to offset carbon emissions from other regions. Bush and colleagues, however, project that very little of Amazonia will behave this way, suggesting that the massive amount of carbon held in Amazonian forest is most likely already close to a maximum capacity.

The researchers conclude that pre-European land-use by native peoples in Amazonia was highly variable, with dense settlements and profound forest disturbance over a relatively small proportion of the basin, leaving large areas little affected by human activity.

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The data used in the study were gathered with support from the National Science Foundation, the Brazilian National Council for Scientific and Technological Development, the Smithsonian Tropical Research Institute and National Museum of Natural History.

Source: Press release of the Florida Institute of Technology.

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UC team discovers rare warrior tomb filled with Bronze Age wealth and weapons

UNIVERSITY OF CINCINNATI—On the floor of the grave lay the skeleton of an adult male, stretched out on his back. Weapons lay to his left, and jewelry to his right.

Near the head and chest was a bronze sword, its ivory hilt covered in gold. A gold-hilted dagger lay beneath it. Still more weapons were found by the man’s legs and feet.

Gold cups rested on his chest and stomach, and near his neck was a perfectly preserved gold necklace with two pendants. By his right side and spread around his head were over one thousand beads of carnelian, amethyst, jasper, agate and gold. Nearby were four gold rings, and silver cups as well as bronze bowls, cups, jugs and basins.

The above describes what a University of Cincinnati-led international research team found this summer when excavating what was initially thought to be a Bronze Age house.

Instead, the team made a rich and rare discovery of an intact, Bronze Age warrior’s tomb dating back to about 1500 B.C., and that discovery is featured in The New York Times, in an article titled: A Warrior’s Grave at Pylos, Greece, Could Be a Gateway to Civilizations.

The find is so extraordinary that UC’s Shari Stocker, senior research associate in the Department of Classics, McMicken College of Arts and Sciences, states: “This previously unopened shaft grave of a wealthy Mycenaean warrior, dating back 3,500 years, is one of the most magnificent displays of prehistoric wealth discovered in mainland Greece in the past 65 years.”

Stocker co-leads the team that unearthed the undisturbed shaft tomb, along with Jack Davis, UC’s Carl W. Blegen Chair in Greek Archaeology. Other team members include UC faculty, staff specialists and students, some of whom have worked in the area around the present-day city of Pylos on the southwest coast of Greece for the last quarter century as part of the Pylos Regional Archaeological Project. That UC-based effort is dedicated to uncovering the pre-history and history of the Bronze Age center known as the Palace of Nestor, an extensive complex and a site linked to Homeric legend. Though the palace was destroyed by fire sometime around 1200 B.C., it is nevertheless the best-preserved Bronze Age palace on the Greek mainland.

It was UC archaeologist Carl Blegen, along with Konstantinos Kourouniotis, director of the National Archaeological Museum, who initially uncovered the remains of the famed Palace of Nestor in an olive grove in 1939. Located near the present-day city of Pylos, the palace was a destination in Homer’s “Odyssey,” where sacrifices were said to be offered on its beaches. The king who ruled at the Palace of Nestor controlled a vast territory that was divided into more than 20 districts with capital towns and numerous small settlements.

Explains Stocker, “This latest find is not the grave of the legendary King Nestor, who headed a contingent of Greek forces at Troy in Homer’s ‘Iliad.’ Nor is it the grave of his father, Neleus. This find may be even more important because the warrior pre-dates the time of Nestor and Neleus by, perhaps, 200 or 300 years. That means he was likely an important figure at a time when this part of Greece was being indelibly shaped by close contact with Crete, Europe’s first advanced civilization.”

Thus, the tomb may have held a powerful warrior or king – or even a trader or a raider – who died at about 30 to 35 years of age but who helped to lay the foundations of the Mycenaean culture that later flourished in the region.

Davis speculates, “Whoever he was, he seems to have been celebrated for his trading or fighting in nearby island of Crete and for his appreciation of the more-sophisticated and delicate are of the Minoan civilization (found on Crete), with which he was buried.”

POTENTIAL WEALTH OF INFORMATION

The team found the tomb while working in the area of the Palace of Nestor, seeking clues as to how the palace and its rulers came to control an area encompassing all of modern Messenia in western Greece and supporting more than 50,000 inhabitants during the Bronze Age.

Davis says that researchers were there to try and figure out how the Palace of Nestor became a center of power and when this rise in power began, questions they now think the tomb may help answer.

Given the magnitude of this find, it may be necessary to rethink when Plyos and the wider area around it began to flourish. It may have been earlier than previously thought since, somehow, whether via trade or force (e.g., raiding), its inhabitants had acquired the valuable objects found within the tomb.

Many of the tomb’s objects were made in nearby Crete and show a strong Minoan style and technique unknown in mainland Greece in the 15th century BC.

The same would likely have been true of the warrior’s dwelling during this lifetime. He would have lived on the hilltop citadel of nearby Englianos at a time when great mansions were first being built with walls of cut-stone blocks (vs. uncut rock and stones) in the style then associated with nearby Mediterranean Island of Crete and its Minoan culture, their walls decorated with paintings influenced by earlier Minoan wall paintings.

The weapons of bronze found within the tomb included a meter-long slashing sword with an ivory handle covered with gold.

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Sharon Stocker, left, and Jack Davis, right, have worked in the Pylos region of Greece for 25 years. They led a team of 45 archaeologists and experts in various specialties as well as students during this summer’s excavations. Stocker stands in the shaft tomb the team uncovered. Credit: University of Cincinnati, Pylos Excavations

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WEALTH OF JEWELS AND WEAPONRY

A remarkable store of riches was deposited in the tomb with the warrior at the time of his death. The mere fact that the vessels in the tomb are of metal (vs. ceramic pottery) is a strong indication of his great wealth.

“It is truly amazing that no ceramic vessels were included among the grave gifts. All the cups, pitchers and basins we found were of metal: bronze, silver and gold. He clearly could afford to hold regular pots of ceramic in disdain,” according to Stocker.

This member of the elite was accompanied in the afterlife by about 50 seal-stones carved with intricate Minoan designs of goddesses as well as depictions of bulls and human bull jumpers soaring over their horns. Four gold rings in the tomb contain fine Minoan carvings. A plaque of carved ivory with a representation of a griffon with huge wings lay between the man’s legs. Nearby was a bronze mirror with an ivory handle. Archaeological conservator Alexandros Zokos was essential partner in the removal, cleaning and preservation of the finds from the grave.

The weapons of bronze within the tomb include a meter-long slashing sword with an ivory handle, several daggers, a spearhead, along with the already-mentioned sword and dagger with gold pommels.

Other grave gifts originally rested above the dead warrior atop a coffin of wood which later collapsed, spilling a crushing load of objects down on the skeleton – and making the job of excavation difficult and slow.

The gifts atop the coffin included bronze jugs; a large, bronze basin; thin bands of bronze, probably from the warrior’s suit of body armor; many wild boar’s teeth from the warrior’s helmet.

In combination with this weaponry, the discovery of so much jewelry with a male burial challenges the commonly held belief that these apparently “feminine” adornments and offerings accompanied only wealthy women to the hereafter.

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This gold ring with a Cretan bull-jumping scene was one of four solid-gold rings found in the tomb. This number is more than found with any other single burial elsewhere in Greece. Credit Jennifer Stephens

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The weapons of bronze found within the tomb included a meter-long slashing sword with an ivory handle covered with gold. Credit: University of Cincinnati, Pylos Excavations

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PREVIOUSLY UNEXPLORED FIELD

What would eventually become the successful excavation of the tomb began on the team’s very first day of its field work in May 2015, conducted in a previously unexplored field near the Palace of Nestor. They immediately found one of the four walls of the warrior’s grave.

“We put a trench in this one spot because three stones were visible on the surface,” says Davis, adding, “At first, we expected to find the remains of a house. We expected that this was the corner of a room of a house, but quickly realized that it was the tops of the walls of a stone-lined grave shaft.”

In the end, the shaft measured about 5 feet deep, 4 feet wide and 8 feet long. It took the team about two weeks to clear the shaft before “we hit bronze,” says Stocker. At that point, they realized they might have an exceptional prize: an undisturbed grave shaft, never stripped by looters. She explains, “The fact that we had not encountered any objects for almost a meter indicated that whatever was at the bottom had been sealed for a long time.”

Stocker and Alison Fields, a UC graduate student of classics, did most of the actual excavation because their smaller size allowed them to work more easily and carefully around the tomb and its many precious objects.

WHAT COMES NEXT

Both Stocker and Davis say it was good luck to discover this intact grave. Given the rarity of the find, it’s unlikely to be repeated. “It’s almost as if the occupant wants his story to be told,” Davis says.

And that story will continue to unfold. The UC team and others are studying the artifacts in detail, with all artifacts remaining in Greece and their final disposition determined by the Greek Archaeological Service. Former UC anthropologist Lynne Schepartz, now of the University of Witwatersrand in Johannesburg, South Africa, will study the skeletal remains.

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RESEARCH PARTNERS AND SUPPORT

The excavation was organized through the Department of Classics, University of Cincinnati, with sponsorship from the American School of Classical Studies in Athens, and with permits from the Greek Ministry of Culture. Research at Pylos by the University of Cincinnati in 2013 was supported by the Institute for Aegean Prehistory, the Louise Taft Semple Fund of UC’s Department of Classics and private donors including Phocion Potamianos, a Greek-American; James H. Ottaway, Jr., trustee of the American School of Classical Studies at Athens; and Robert McCabe, president of the Board of Trustees of the American School of Classical Studies at Athens, and his wife, Dina McCabe.

Davis and Stocker also give credit and thanks to their team, the “very helpful local office of the Ministry of Culture of Greece and guards who provided security; Evangelia Militsi, director of antiquities for the Messenia office of the Ministry of Culture, and Evangelia Malapani, curator of antiquities.”

CATALOGUE OF OBJECTS FOUND WITHIN THE WARRIOR TOMB

GOLD

  • Four complete solid-gold seal rings to be worn on a human finger. This number is more than found with any single burial elsewhere in Greece.
  • Two squashed gold cups and a silver cup with a gold rim
  • One unique necklace of square box-shaped golden wires, more than 30 inches long with two gold pendants decorated with ivy leaves.
  • Numerous gold beads, all in perfect condition.

SILVER

  • Six silver cups.

BRONZE

  • One three-foot long sword, with an ivory hilt overlaid with gold in a rare technique imitating embroidery (found at warrior’s left chest).
  • Under this sword was a smaller dagger with a gold hilt employing the same technique.
  • Other bronze weapons by his legs and feet.
  • Bronze cups, bowls, amphora, jugs and a basin, some with gold, some with silver trim.

SEAL STONES

  • More than 50 seal stones, with intricate carvings in Minoan style showing goddesses, altars, reeds, lions and bulls, some with bull-jumpers soaring over the bull’s horns – all in Minoan style and probably made in Crete.

IVORY

  • Several pieces of carved ivory, one with a griffon with large wings and another depicting a lion attacking a griffon.
  • Six decorated ivory combs.

PRECIOUS STONE BEADS

  • An astonishing hoard of over 1000 beads, most with drill holes for stringing together. The beads are of carnelian, amethyst, jasper and agate. Some beads appear to be decorations from a burial shroud of woven fabric, suggested by several square inches of cross woven threads which survived in the grave for 3,500 years.

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Research backs human role in extinction of mammoths, other mammals

UNIVERSITY OF WYOMING—Radiocarbon analysis of the decline and extinction of large mammals in the Americas lends support to the idea that hunting by humans led to the animals’ demise—and backs the generally accepted understanding of when humans arrived in, and how they colonized, the Western Hemisphere.

Those findings by University of Wyoming researchers are reported this week in an article published in the Proceedings of the National Academy of Sciences, a major scientific journal. The study was conducted by Professor Todd Surovell and graduate student Spencer Pelton in UW’s Department of Anthropology; Professor Richard Anderson-Sprecher in the Department of Statistics; and Assistant Professor Adam Myers in the Department of Physics and Astronomy.

Their work supports a hypothesis forwarded in 1973 by well-known geoscientist Paul Martin that the chronology of the extinction of animals such as mammoths, mastodons, camels, horses and ground sloths in the Americas could be used to map the spread of humans through the New World.

“The heavy ecological footprint of human societies throughout prehistory is becoming increasingly apparent through a variety of environmental (indicators) independent of the archeological record,” the researchers wrote. “Past human societies have disrupted ecological communities in dramatic ways for many tens, if not hundreds of thousands, of years.”

The study involved compiling radiocarbon dates from fossils of now-extinct animals from North and South America, and looking at how those dates correspond with initial evidence of human colonization. The researchers found that, as Martin predicted, decline and extinction of the large mammals began between 13,300-15,000 years ago in Alaska and areas near the Bering Strait; between 12,900-13,200 years ago in the contiguous United States; and between 12,600-13,900 years ago in South America.

That supports the generally accepted understanding of how humans colonized the Americas: first, that they crossed from Siberia to Alaska across a Bering Strait land bridge; and then that they moved southward across North America and into South America. Hunting of the native large mammals is thought to have fueled rapid human population growth and expansion.

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Participants in the University of Wyoming’s Archaeological Field School work at the site of a mammoth kill near LaPrele Creek in Converse County, Wyo., during the past summer. A new study by UW researchers supports the hypothesis that hunting by humans led to the extinction of mammoths and other large mammals in the Americas between 12,600 and 15,000 years ago. Credit:  UW Photo

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A number of hypotheses have been forwarded to explain the extinction of those animals. The “overkill hypothesis” connects their demise directly to overhunting by humans, and that is supported by the north-to-south extinction trend observed in the new study.

“… (T)he north to south time-transgressive pattern is striking, and, barring significant new data, it would be difficult to reconcile this pattern with extinction hypotheses that invoke a single climatic, ecological or catastrophic extinction mechanism across the entirety of the Americas,” the researchers wrote.

Still, they acknowledge that the issue isn’t completely settled. They note that the radiocarbon results show that the initial decline of large mammals in the far north began earlier than has been estimated by Martin and others, pointing to human colonization earlier than the current archeological record suggests; and that there is some evidence of isolated human populations in North America as early as 15,500 years ago, before significant declines in large mammal populations. Further study is needed to resolve those issues, the researchers say.

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DNA from ancient baby remains in Alaska supports Bering land bridge layover

SALT LAKE CITY, Oct. 26, 2015 – University of Utah scientists deciphered maternal genetic material from two babies buried together at an Alaskan campsite 11,500 years ago. They found the infants had different mothers and were the northernmost known kin to two lineages of Native Americans found farther south throughout North and South America.

By showing that both genetic lineages lived so far north so long ago, the study supports the “Beringian standstill model.” It says that Native Americans descended from people who migrated from Asia to Beringia – the vast Bering land bridge that once linked Siberia and Alaska – and then spent up to 10,000 years in Beringia before moving rapidly into the Americas beginning at least 15,000 years ago.

“These infants are the earliest human remains in northern North America, and they carry distinctly Native American lineages,” says University of Utah anthropology professor Dennis O’Rourke, senior author of the paper set for online publication the week of Oct. 26 in the journal Proceedings of the National Academy of Sciences.

“We see diversity that is not present in modern Native American populations of the north and we see it at a fairly early date. This is evidence there was substantial genetic variation in the Beringian population before any of them moved south.”

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 This is the Upward Sun River archaeological site in Alaska. Credit Ben Potter, University of Alaska Fairbanks

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Another theory was that the two Native Americans lineages evolved as the people moved south and dispersed, not while they still were in Beringia, says Justin Tackney, the new study’s first author and a University of Utah anthropology doctoral student. But finding those lineages in the infants only a few thousand years after the migration south began indicates those lineages already were present before the migration started.

“It supports the Beringian standstill theory in that if they [the infants] represent a population that descended from the earlier Beringian population, it helps confirm the extent of genetic diversity in that source population,” O’Rourke says. “You don’t see any of these lineages that are distinctly Native American in Asia, even Siberia, so there had to be a period of isolation for these distinctive Native American lineages to have evolved away from their Asian ancestors. We believe that was in Beringia.”

The burial of ancient infants is rare. One was a 6- to 12-week-old baby; the other a stillborn or preterm 30-week fetus. The discovery of the infant burials first was reported in the same journal this past November. They are among human remains at only eight sites in North America older than 8,000 years and from which researchers obtained mitochondrial DNA – genetic information inherited only from mothers. The infants are the northernmost of all those remains and of the two lineages they represent.

In the eight sites, “we find all five of the major lineages of Native Americans,” Tackney says. “That indicates that all were present in the early population in Beringia that gave rise to all modern Native Americans.”

Sequencing DNA from the burials of Upward Sun River

The Upward Sun River ancient campsite was discovered in 2006 in the Tanana River valley about 50 miles southeast of Fairbanks. The area once was part of Beringia. The land bridge between Asia and Alaska existed when sea levels were low during the last Ice Age from 28,000 years ago to at least 18,000 years ago.

In 2010, a team led by University of Alaska Fairbanks anthropologist Ben Potter discovered the remains of a cremated 3-year-old child buried near the hearth of a residential structure. The child’s DNA couldn’t be recovered from the charred remains.

In 2013, Potter’s team found the remains of two more buried infants beneath the first. They had’t been cremated. Potter says it’s hard to tell how the infants died. Potter, who co-authored the new study, asked O’Rourke to analyze their mitochondrial DNA.

O’Rourke and Tackney worked with University of Utah geneticists to sequence the mitochondrial DNA of the two infants – known as USR1 and USR2 for Upward Sun River. Mitochondrial DNA is located in mitochondria, or the power plants of cells.

From fragments of skull bone, the researchers read 58.7 million DNA sequences from USR1 and 55.8 million from USR2. From those, the Utah scientists obtained 20,004 high-quality mitochondrial DNA sequences for USR1 and 32,979 for USR2.

“We were able to obtain the entire mitochondrial genome [genetic blueprint] sequence for each of them, as opposed to just a partial sequence,” O’Rourke says.

Infants related to two native lineages throughout the Americas

Potter says the new findings help in “understanding the genetic diversity among very early Beringian populations that connects them in many ways to Native Americans in both North and South America.”

The researchers identified infant USR1 as belonging to Native American lineage C1b, while infant USR2 is part of a more common native lineage known as B2. (Native American lineages begin with the letters A, B, C, D or X.)

“It’s not common to find infants buried together that are not related maternally,” O’Rourke says. “It raises questions about the social structure and mortuary practices of these early people,” including whether the babies had a common father.

Lineage C1 (most remains aren’t identified to the subgroup C1b level) is found most often among the Pima and Hualapai Indians of Arizona, the Delta Yuman of California, and six other tribes, including the Ignaciano in Bolivia, the extinct Tainos in Puerto Rico and a group represented by 700-year-old bones at Norris Farms in Illinois.

Lineage B2 is found most often in 37 tribes throughout the Americas, including the Yakama, Wishram, Northern Paiute-Shoshoni, Navajo, Hualapai (which also carries C1 genes), Zuni and Jemez in North America and the Quecha and Aymara in Peru. The B2 lineage also was common among the U.S. Southwest’s ancient Fremont and Anasazi.

The genetic data indicate that the most recent common ancestor of the C1b lineage existed at least 12,854 years ago, and the most recent common ancestor of the B2 lineage existed at least 12,024 years ago. O’Rourke suspects the real times were even earlier, but that nonetheless both 11,500-year-old infants were at or near the root of their respective genealogical trees.

“It may well be that the population represented by Upward Sun River is indicative of many such isolated populations distributed across Beringia, each of which may have contributed migrants to that early American Indian dispersal, and each may have been slightly genetically different from the others,” O’Rourke says.

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earlyamericangeneticspic2

This map shows the location of the Upward Sun River site in Alaska where the remains of two infants, Upward Sun River individuals 1 and 2, were found in an 11,500-year-old burial. A new University of Utah analysis shows the infants belong to two genetic groups or lineages known as B2 and C1. The maps shows other Native American groups throughout the Americas that are part of the same lineages. Credit Ben Potter, University of Alaska Fairbanks

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Native lineages spread unevenly in the Americas

Modern tribal populations in northern North America show little mitochondrial DNA diversity, O’Rourke says. Why did lineages that once occupied the subarctic vanish there but show elsewhere in the Americas? And why aren’t the five major lineages spread evenly across the Americas?

“The reason is changes in population size and rates of population migration,” O’Rourke says. “In small populations, some lineages just get lost and don’t get passed on, and in others they become established and more common.”

“Studying the DNA of ancient individuals is important in researching how the Western Hemisphere was populated,” Tackney says. “Studying the genetics of these infants who died 11,500 years ago in what is now central Alaska helps answer questions of who these people were and how they are related to modern native populations.”

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The study was funded by the National Science Foundation and University of Utah, and supported by representatives of two native groups in the Upward Sun River area: the Healy Lake Tribal Council and Tanana Chiefs Conference.

O’Rourke, Tackney and Potter conducted the study with University of Utah senior lab specialists Michael Powers of the DNA sequencing core facility and W. Scott Watkins, in human genetics, and Derek Warner, sequencing facility director. Other co-authors were University of Kansas anthropologist Jennifer Raff, a former Utah postdoctoral fellow; archaeologist Joshua Reuther, of the University of Alaska Fairbanks; and bioarchaeologist Joel Irish, of Liverpool John Moores University.

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New insights on the wooden weapons from the Paleolithic site of Schöningen

The Paleolithic site of Schöningen in north-central Germany is famous for the earliest known, completely preserved wooden weapons or artifacts uncovered there by archaeologists under the direction of Dr. Hartmut Thieme between 1994 and 1998 at an open-cast lignite mine. Deposited in organic sediments at a former lakeshore, they were found in combination with the remains of about 16,000 animal bones, including 20 wild horses, whose bones featured numerous butchery marks, including one pelvis that still had a spear protruding from it. The finds are considered evidence that early humans were active hunters with specialized tool kits as early as 300,000 or more years ago. In a recent study, a team of scientists from Germany and Switzerland document results of an ongoing analysis of the nine spears, one lance, a double pointed stick, and a burnt stick dating to the Holsteinian, c. 300 kyr. Macroscopic and microscopic analyses, as well as studies of thin sections, have now contributed to a better understanding of the manufacture of the wooden weapons.

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 The Schöningen excavation site. Tangelnfoto, Wikimedia Commons

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Spear 6 in situ. P. Pfarr NLD, Wikimedia Commons 

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 Spear 8 in situ. P. Pfarr NLD, Wikimedia Commons

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In general, the researchers report that the spears are extremely well-preserved and show no or little sign of taphonomic alteration, although some of the weapons are broken and parts were slightly moved, likely through water action. Most significantly, the excellent preservation conditions have provided considerable information on the operational sequence of production. Specifically, the hunters selected thin trunks of spruce or pine and initially stripped off the bark. Traces of cutting, scraping, and smoothing can be observed on the spear surfaces in detail. In the case of one of the artifacts, designated ‘spear X’, repeated use of the weapon is implied by apparent re-sharpening of the tip.

The researchers also suggest that analyses of the wood anatomy provides information on climatic conditions at the time of production, and contribute to a better understanding of the development of the site.

The detailed study report is published as an article in press in the Journal of Human Evolution.

Source: Edited and adapted from the subject abstract and other information sources.

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The Sphinx that came to Philadelphia

PHILADELPHIA, PA, OCTOBER 2015—A regal and undisputed centerpiece of the lower Egypt Gallery, the Penn Museum’s massive granite Sphinx—the largest ancient sphinx in the Western Hemisphere—has long been an icon for the Museum and a “must see” for visiting guests. In 2013, when the Sphinx had been in Philadelphia 100 years, the Museum hosted a party, inviting the public and Philadelphia school children to come out and celebrate. Hijinks with the Sphinx featured talks, a social media contest, family activities, and anniversary cupcakes to mark the occasion.

Meanwhile, Josef Wegner and Jennifer Houser Wegner, long-time Associate Curators in the Museum’s Egyptian Section, were working on an even bigger tribute: a book. While the idea started out as an oversized booklet, their research took on a life of its own, and the fascinating story behind the Sphinx took on a more sizeable form. The Sphinx That Traveled to Philadelphia: The Story of the Colossal Sphinx in the Penn Museum, published by the Penn Museum and distributed by the University of Pennsylvania Press, is a uniquely Philadelphia story told in 256 pages packed with 455 illustrations. The hardbound book ($29.95) goes on sale in the Penn Museum shop beginning November 1. Readers can also order the book through the University of Pennsylvania Press website and other retail outlets.

“When we started the project we knew the sphinx was a wonderful artifact—but we had no idea how wonderful,” noted Joe Wegner. “Before long, we realized that this one extraordinary object, created thousands of years ago by ancient Egyptians, had many fascinating stories to tell. The sphinx is silent no more.”

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sphinxbook

Written to celebrate the centennial of the Sphinx’s arrival in Philadelphia in 1913, the narrative of The Sphinx that Traveled to Philadelphia covers the original excavations and archaeological history of the Sphinx, how it came to Philadelphia, and the unexpected ways in which the Sphinx’s story intersects with the history of Philadelphia, the University of Pennsylvania, and the Museum just before World War I.

The book features ample illustrations—photographs, letters, newspaper stories, postcards, maps, and drawings—drawn largely from the extensive materials in the Museum Archives. Images of related artifacts in the Penn Museum’s Egyptian collection and other objects from the Egyptian, Near East, and Mediterranean Sections (many not on view and some never before published), as well as pieces in museums in the US, Europe, and Egypt, place the story of the Penn Museum Sphinx in a wider context. The writing style is informal and text is woven around the graphics that form the backbone of the narrative.

The Sphinx that Traveled to Philadelphia is designed to be of interest to a wide audience of adult readers but accessible and engaging to younger readers—including, hopefully, the next generation of Egyptologist, as well.

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If you liked this and you like Egyptology, see the full feature article about the grand throne room of Merenptah, Merenptah Rising, in Popular Archaeology.

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Source: Penn Museum subject press release.

Photos, top to bottom: The Penn Museum’s lower Egypt Gallery features the largest ancient sphinx in the Western Hemisphere (Photo: Penn Museum). Cover of The Sphinx That Traveled to Philadelphia: The Story of the Colossal Sphinx in the Penn Museum, published by the Penn Museum and distributed by the University of Pennsylvania Press (Image courtesy of the University of Pennsylvania Press).

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The environment of the Cantabrian Region in the course of 35,000 years is reconstructed

UNIVERSITY OF THE BASQUE COUNTRY—By combining three important palaeoclimatic records (small vertebrates, marine microfauna and stable isotopes of herbivores), a multidisciplinary team of the UPV/EHU has reconstructed past environments with the best resolution ever achieved. The study*, led by Juan Rofes, currently a researcher at the Musèum National d’Histoire Naturelle, CNRS, Paris, has been published in the prestigious British Scientific Reports, which is one of the Nature group journals.

This group of archaeologists, palaeontologists, geologists, geochemists and palaeo-oceanographers has for the first time reconstructed the environment covering a period of nearly 35,000 years of the Cantabrian Region during the Upper Pleistocene. To do this, they have combined three palaeoclimatic records: marine microfauna, small vertebrates and stable isotopes of herbivores. The latter two records come from the Antoliñako Koba site (Gautegiz-Arteaga, Bizkaia, Basque Country, Spain), an exceptional archaeological deposit containing a long chrono-cultural sequence of nine levels, ranging from the Aurignacian and going right up to the Epipalaeolithic. This site was excavated and processed over a 20-year period by the archaeologist Mikel Aguirre (UNED-Open University), who is also a member of the multidisciplinary team.

“The two principal merits of the study are, firstly, having compared the continental and marine records of the same region, filling the gaps that existed in the terrestrial sequence by using the marine record, which tends to be more complete; and, secondly, having produced a continuous palaeo-environmental reconstruction of the period between 44 and 9 million years before present in the Cantabrian Region”, explained archaeozoologist and palaeontologist Juan Rofes. The article has been published by the journal Scientific Reports, which, owing to its high impact index (WOS 2014: 5.58), is the fifth most important multidisciplinary publication in the world.

Specifically, the changes in the communities of microvertebrates (mammals, amphibians and reptiles) and the stable isotope data (carbon and nitrogen) obtained from the bone collagen of deer in the continental site, have been compared with marine microfaunal evidence (foraminifera, planktonic and benthic species, ostracods and oxygen isotopes) gathered in the south of the Bay of Biscay by Dr Blanca Martínez-García (UPV/EHU). The sequence at the Antoliñako Koba site was dated by means of radiocarbon, which made it possible to compare the various signs with each other, and also with other known environmental records of the North Atlantic (sedimentary and pollen phases of the Cantabrian Region, variations in the sea level and ice cores made to the north of Greenland).

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A view of Antoliñako Koba site (Gautegiz-Arteaga, Bizkaia, Basque Country, Spain) during the excavation. Credit Mikel Aguirre.

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The research confirms a series of warm and cold events in the Cantabrian Region, which to a greater or lesser extent coincide with the climate evolution in the northern hemisphere during the Upper Pleistocene. “The contribution of this exhaustive palaeo-environmental reconstruction to regional and continental prehistory is unquestionable, since it enables us to get to know the climatic and environmental framework in which human groups in the past moved and which determined many of their strategies to adapt and survive. What is more, at this time of climate change increased by human pressure, it is a good idea to look at the past in order to learn lessons for the future,” explained Rofes. The study came about during the postdoctoral training period that Juan Rofes (Lima, Peru, 1974), PhD holder of the University of Zaragoza, spent at the UPV/EHU’s Faculty of Science and Technology. Today, he is on a European Union post-doctoral Marie Curie contract at the Musèum National d’Histoire Naturelle, CNRS, Paris.

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*Rofes, J., Garcia-Ibaibarriaga, N., Aguirre, M., Martínez-García, B., Ortega, L., Zuluaga, M.C., Bailon, S., Alonso-Olazabal, A., Castaños, J. & Murelaga, X. Combining Small-Vertebrate, Marine and Stable-Isotope Data to Reconstruct Past Environments. Scientific Reports 5, 14219; doi: 10.1038/srep14219 (2015). http://www.nature.com/articles/srep14219

Source: Subject press release of the University of the Basque Country

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Shift in weaning age supports hunting-induced extinction of Siberian woolly mammoths

UNIVERSITY OF MICHIGAN, ANN ARBOR—Chemical clues about weaning age embedded in the tusks of juvenile Siberian woolly mammoths suggest that hunting, rather than climate change, was the primary cause of the elephant-like animal’s extinction.

Woolly mammoths disappeared from Siberia and North America about 10,000 years ago, along with other giant mammals that went extinct at the end of the last glacial period. Current competing hypotheses for the mammoth’s extinction point to human hunting or climate change, possibly combining in a deadly one-two punch.

Despite decades of study, the issue remains unresolved and hotly debated. But two University of Michigan paleontologists may have found an ingenious way around the logjam.

U-M doctoral student Michael Cherney and his adviser, Museum of Paleontology Director Daniel Fisher, say an isotopic signature in 15 tusks from juvenile Siberian woolly mammoths suggests that the weaning age, which is the time when a calf stops nursing, decreased by about three years over a span of roughly 30,000 years leading up to the woolly mammoth’s extinction.

Climate-related nutritional stress is associated with delayed weaning in modern elephants, while hunting pressure is known to accelerate maturation in animals and would likely result in earlier weaning, according to Cherney and Fisher.

“This shift to earlier weaning age in the time leading up to woolly mammoth extinction provides compelling evidence of hunting pressure and adds to a growing body of life-history data that are inconsistent with the idea that climate changes drove the extinctions of many large ice-age mammals,” said Cherney, who is conducting the work for his doctoral dissertation in the U-M Department of Earth and Environmental Sciences.

“These findings will not end the debate, but we hope they will show people the promise of a new approach toward solving a question that, so far, has just led to divided camps,” said Cherney, who is scheduled to present his findings Oct. 15 at a meeting of the Society of Vertebrate Paleontology in Dallas.

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 The scholarly debate on what caused the extinction of the woolly mammoth has revolved around the competing hypotheses of climate change and human hunting. Flying Puffin, Wikimedia Commons

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 A fragment of a woolly mammoth tusk. Bone from the tusks of mammoths have been sampled and tested for study to help resoved the mystery of the mammoth extinction. James Petts, Wikimedia Commons

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The study was made possible by the extensive collection of Siberian mammoth tusks that Fisher has amassed over the past 20 years. The specimens–collected and exported under permits from the Russian government with the help of colleagues in Russia, France and the Netherlands–include about three dozen juvenile tusks.

“We have known for about a decade that valuable information about weaning age could be extracted from these tusks,” said Fisher, a professor in the Department of Earth and Environmental Sciences and the Department of Ecology and Evolutionary Biology. Fisher also led the team that recovered the partial remains of a mammoth this month near Chelsea, Michigan.

“But this is the first time we’ve had data from enough individuals, and covering a wide enough range of geologic ages, to show a pattern through time,” Fisher said. “This is a milestone in the development of our approach, and it shows that the extinction problem is solvable.”

Fifteen tusks from individuals ranging in age from 3 to 12 were analyzed. The 3-year-old’s tusk is about 10 inches long, while the 12-year-old’s tusk is about 30 inches long.

As part of the study, Cherney measured the isotopic composition of tail hairs from a mother-calf pair of African elephants at the Toledo Zoo. The elephant calf was in the process of being weaned from mother’s milk, which enabled Cherney to observe the isotopic effects of nursing and the long transition to a fully solid diet for a close relative of mammoths.

Cherney compared the ratio of the two stable isotopes of nitrogen, nitrogen-14 and nitrogen-15, from proteins in elephant tail hairs. He found that as the proportion of solid food in the elephant calf’s diet increased, the ratio of nitrogen-15 to nitrogen-14 steadily dropped. This pattern had been previously documented in other mammals, including humans, but never in elephants.

Armed with this isotopic weaning signature, he then turned to the mammoth tusks. CT scans enabled Cherney to identify annual growth increments–which resemble a tree’s annual growth rings–in the tusks. Samples for each year of growth were collected, and nitrogen isotopes from collagen proteins were measured.

The isotopic ratios from the calves’ early years of life consistently displayed a trend toward lower nitrogen-15 values, reflecting the decreased contribution of milk to the overall diet, Cherney said.

“It was the same pattern we saw in the Toledo Zoo elephant calf,” he said.

The gradual decrease in nitrogen-15 was followed, in most cases, by an abrupt increase that Cherney and Fisher interpret as a sign of short-term nutritional stress during the first year after being fully weaned.

Radiocarbon dating of the 15 Siberian tusks showed they span the period from about 40,000 years ago to about 10,000 years ago.

Cherney and Fisher showed that over the span of 30,000 years, the average weaning age decreased from age 8 to age 5.

The current weaning study is part of a much larger, decades-long effort by Fisher and a series of graduate students to extract “life history” information preserved in fossil tusks. Biologists use the term life history to refer to the full range of changes an organism experiences in the course of its growth and development.

“I started studying tusks 30 years ago and realized early on that life histories are the key,” Fisher said. “Nobody else has used tusks, which are after all a record of life and growth, as a source of data in this way.”

Over the years, Fisher and his students have shown that mammoth tusks hold life-history information about growth rates, age of sexual maturation, spacing of pregnancies, and weaning.

Because the timing of those life-history milestones can be affected by various environmental pressures, the tusks provide a way to “look directly at how the animals themselves were impacted by, and responded to, changes in their environment,” Cherney said.

Often, environmental changes have predictable effects on life histories. By analyzing evidence from mammoth tusks, Fisher and his students can test those predictions.

“The strength of life-history analyses for resolving the extinction debate rests in the knowledge that the age of final weaning is a life-history landmark that is expected to change differently in response to predation and climate-related nutritional stress,” said Cherney, who will speak during the Romer Prize Session at the paleontology meeting. “Our analysis sets up a test of competing hypotheses, and our preliminary results are consistent with expectations under hunting pressure.”

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The work was funded in part by grants from the National Science Foundation, the National Geographic Society and CRDF Global. Cherney and Fisher plan to submit their findings for publication in a scientific journal.

Source: Subject University of Michigan press release.

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Our ancestors probably didn’t get 8 hours a night, either

UNIVERSITY OF CALIFORNIA – LOS ANGELES—They stay up late into the evening, average less than 6.5 hours of sleep and rarely nap.

College students during final exams? Working moms? Hard-charging executives? Think again, says a UCLA-led team of researchers who studied sleeping patterns among traditional peoples whose lifestyles closely resemble those of our evolutionary ancestors.

What the team found among the Hadza of Tanzania, the San of Namibia and the Tsimane of Bolivia challenges conventional wisdom about the sleeping habits of pre-industrial humans. The findings, published today in Current Biology, suggest that the industrialized world’s sleep habits do not differ much from those that humans evolved to have.

“The argument has always been that modern life has reduced our sleep time below the amount our ancestors got, but our data indicates that this is a myth,” said Jerome Siegel, leader of the research team and professor of psychiatry at UCLA’s Semel Institute of Neuroscience and Human Behavior.

“I feel a lot less insecure about my own sleep habits after having found the trends we see here,” added lead author Gandhi Yetish, a Ph.D. candidate at the University of New Mexico.

The findings do validate some common ideas about sleep and health, including the benefits of morning light, a cool bedroom and a consistent wake-up time.

An international authority on sleep, Siegel is a past president of the Sleep Research Society. For 40 years, he has run a basic sleep research lab in Los Angeles.

He started studying sleep among traditional peoples two years ago, asking anthropologists who were already heading into field to bring along special watch-sized devices that measure sleeping and waking times as well as light exposure.

Researchers from Hunter College, Yale University, UC Santa Barbara and the University of New Mexico clocked sleep patterns among the Hadza, hunter-gatherers who live near the Serengeti National Park, and the Tsimane, hunter-horticulturalists who live along the Andean foothills.

Siegel, aided by contacts supplied through a colleague at Witwatersrand University in South Africa, gathered measurements among the San hunter-gatherers in the Kalahari Desert. In addition to measuring how long and when these adults slept during the summer and winter, Siegel measured their body temperatures, the temperature in their environment and the amount of light to which they were exposed.

The team, which received support from UCLA, the National Institute of Health and the National Research Foundation of South Africa, collected sleep records on 94 adults for a total of 1,165 days. The study is the first on the sleep habits of people who maintain foraging and traditional hunting lifestyles in the present day.

One myth dispelled by the results is that in earlier eras people went to bed at sundown. The subjects of the study stayed awake an average of 3 hours and 20 minutes after sunset.

“The fact that we all stay up hours after sunset is absolutely normal and does not appear to be a new development, although electric lights may have further extended this natural waking period,” said Siegel, who is also chief of neurobiology research at the Veteran Affairs of Greater Los Angeles Health Care System.

Most of the people studied by Siegel’s team slept less than seven hours each night, clocking an average of six hours and 25 minutes. The amount is at the low end of sleep averages documented among adults in industrialized societies in Europe and America.

“There’s this expectation that we should all be sleeping eight or nine hours a night and that if you took away modern technology people would be sleeping more,” said Yetish, who spent 10 months with the Tsimane. “But now for the first time we’re showing that’s not true.”

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 The Hadza of Tanzania are often the subject of studies as an analog for life in prehistoric times in Africa. Kiwi Explorer, Wikimedia Commons

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There is no evidence that these sleep patterns took a toll on people’s health. In fact, extensive studies have found that these groups have lower levels of obesity, blood pressure and atherosclerosis than people in industrialized societies, and higher levels of physical fitness.

The amount they slept varied with the seasons, with the study’s subjects averaging six hours in the summer and just under seven hours in the winter. Still, they rarely took naps.

“There’s this myth that humans used to take daily naps, but that now—because we’re so busy and we can’t get back to our homes—we suppress the naps,” Siegel said. “In fact, napping, is relatively rare in these groups.”

One recent history suggested that humans evolved to sleep in two shifts, a practice chronicled in early European documents. But the people Siegel’s team studied rarely woke for long after going to sleep.

Siegel chalks up the discrepancy between his findings and the historical record to a difference in latitudes. The groups of people studied live near the equator, as did our earliest ancestors; by contrast, early Europeans migrated from the equator to latitudes with much longer nights, which may have altered natural sleeping patterns, he said.

“Rather than saying modern culture has interfered with the natural sleep period, this is a case in which modern culture, with its electric light and temperature control, was able to restore the natural sleep period, which is a single period in traditional humans today and therefore likely in our evolutionary ancestors as well,” Siegel said.

Insomnia was so rare among those studied that the San and the Tsimane do not have a word for the disorder, which affects more than 20 percent of Americans.

The reason may have to do with sleep temperature. The people studied consistently slept during the nightly period of declining ambient temperature, Siegel found. Invariably, they woke up when temperatures, having fallen all night, hit the lowest point in the 24-hour period. This was the case even when the lowest temperature occurred after daybreak. The pattern resulted in roughly the same wake-up time each morning, a habit long recommended for treating sleep disorders.

“In most modern environments, people are sleeping in a fixed temperature, even if it is reduced from daytime levels,” Siegel said. “It may well be that falling environmental temperature is integral to sleep control in humans.”

The team was surprised to find that all three groups receive their maximal light exposure in the morning. This suggests that morning light may have the most important role in regulating mood and the suprachiasmatic nucleus, a group of neurons that serve as the brain’s clock. Morning light is uniquely effective in treating depression.

“Many of us may be suffering from the disruption of this ancient pattern,” Siegel said.

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Source: University of California subject press release.

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Archaeologists memorialize the historic chancel burials at Jamestown

It stands no more, but the first chapel ever to be built on the North American continent by early English settlers has its successor in a newly reconstructed rendition placed at the very spot where the original church stood within the historic James Fort at the Jamestown site, Virginia, over 400 years ago—and now, a recently installed cedar railing reconstruction frames the space within the church where four famous founders of Jamestown were buried.

Says Dave Givens, Senior Staff Archaeologist with the Jamestown Rediscovery project, the reconstructed cedar railing was designed to replicate as much as reasonably possible the original cedar railing that stood at the spot beginning in 1608. Archaeology and historic documents have served to inform the builders of the railing, just as they informed the builders regarding the mud-and-stud partial reconstruction of the original church ‘footprint’ detected by the archaeological excavations.

Secretary of the Jamestown colony William Strachey is recorded to have described the church, containing the chancel railing where Pocahontas and English tobacco grower John Rolfe presumably married in 1614, as having “a chancel in it of cedar”.

The recently excavated church ‘footprint’ dimensions and location matched those described for it in the historical record. Moreover, four burials uncovered in the chancel space provided further evidence of the ecclesiastical significance of the space. The skeletal remains within those burial spaces were identified as likely belonging to Robert Hunt, the first minister at Jamestown; Sir Ferdinando Wainman, the first English knight buried in North America; Captain Gabriel Archer; and Captain William West, a relative of Lord De La Warr. (See the videos below)  Burials of high status or important community members were often traditionally buried in the chancel spaces of churches during those times.

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 Excavation of the chancel burials at the James Fort site in historic Jamestown, Virginia. (Screenshot from YouTube video, see below)

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As the new reconstructions are designed to demarcate and represent the same construction that existed at the spot beginning in 1608, Jamestown Rediscovery archaeologists hope that they will afford the visiting public an authentically accurate experience for visualizing the place where so much history took place in the earliest years of English colonization of North America. 

For more information about the discoveries at Jamestown, go the Jamestown Rediscovery project website.

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Mysterious Ancient Maya Mural Keeps Its Secrets

Archaeologists have uncovered some inexplicable finds in a rare case involving the discovery of a Maya wall painting, or mural, at a shrine complex at the ancient site of Tulix Mul in northern Belize.

Buried anciently under a fill of large uncut stones at the beginning of the Maya Late Classic period, a vaulted room within a monumental structure features a plastered wall that hides two successive wall paintings, an unusual find for archaeologists investigating Maya remains. The discovery was first made in 2013 as a team of archaeologists, students and volunteers under the Blue Creek Archaeological Project with the Maya Research Program (MRP) and the University of Texas at Tyler began excavating a structure that showed intrusion by a looter’s trench at the site of Tulix Mul, which is associated with another site known as Nojol Nah, a site where MRP has been excavating for years. Although excavations at this structure revealed the plastered, vaulted room, the biggest prize was the evidence of the wall painting, hidden beneath the plaster. Through time, small fragments had exfoliated from the plaster, revealing the underlying presence of a polychrome, fine-line mural. The mural style appeared generally similar to that found years before by other archaeologists at San Bartolo in Guatemala. Like San Bartolo, there are only a few other known Maya murals found in Central America. Aside from their artistic beauty, they have provided significant new information about Maya art, religious concepts, trade and interaction. The Tulix Mul mural may prove to be equally informative, especially as the site investigators suspect that another rubble-filled room (still unexcavated) may also contain a mural.

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muralarticle1

 View of Tulix Mul from the south. Courtesy Maya Research Program

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Site map of Tulix Mul, with structure featuring the mural indicated as ‘F’. From the 23rd Annual Report (see below), Maya Research Program and Center for Social Science Research.

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 Above and below: View into the vaulted room, now excavated, containing the mural, which includes a bench below and in front of it (currently still mostly plasted over by the ancients). Courtesy Maya Research Program

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 Closeup detail view of mural thus far exposed. Courtesy Maya Research Program

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But after several seasons of working at the site of the mural, only traces of the mural still remain visible. That’s because of the delicate condition of the murals beneath their overlying plaster shroud, and the effects of the environment decaying the associated material through time. Efforts thus far have produced mixed results.

“We were very pleased to have stabilized and conserved the mural at Tulix Mul,” said Colleen Hanratty, one of the leading archaeologists with the MRP. “But we were not able to reveal more of the secondary mural below the first due to it’s very unstable nature.”

Thus, ongoing work at the mural site will require patience and special attention. Pieta Greaves, the on-site conservator of the mural, reports that because of the fragmentary condition of the visible images, continuing work will “require a specialist to further determine the nature of the images.”*

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mural1a

Above and below: GigaPan technology, a robotic camera mount system used to create super-high resolution panoramic photographs (based on similar technology used by NASA for the Mars rovers), was applied to create views that made these images of the exposed fragmentary portions of the mural possible. From the 23rd Annual Report (see below), credit Texas A&M University’s Center for Heritage Conservation, GigaPan, and the Maya Research Program and Center for Social Science Research.

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mural2a

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In the meantime, scientists are scratching their heads over the presence of incised symbolic or image markings on the plaster that covers the wall painting. The ‘graffiti’, as they are calling it, is clearly ancient, as it was obviously incised before the vaulted room containing the mural was filled in by stones at the beginning of the Late Classic period. “Due to the hardness of the plaster and the cleanness of the lines,” reports Greaves, “it is likely that a lithic tool would have been used to create the designs.”*

The images, by interpretation, include an unknown animal and fish, and a crouched figure looking over a representation of the sun at what appears to be a monster. The other images remain without interpretation and it is not known how much of the entire graffiti work has been lost through time by plaster loss. 

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muralgraffitia

 A graffiti scene showing what has been interpreted as a possible crouched figure looking over the sun towards a monster. From the 23rd Annual Report (see below), Maya Research Program and Center for Social Science Research.

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In time, however, the underlying mural, once uncovered and more thoroughly studied, could have important implications for understanding Tulix Mul and by extension the behavior of the Maya elite generally. Reported Thomas Guderjan, the Director of the Blue Creek Archaeological Project, the mural “was above and behind a bench viewable from the courtyard and would frame the figure of the noble seated on the bench as he was approached…….a very powerful statement.”*

See more about the wall paintings in the January 2014 issue of Popular Archaeology.

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*The 23rd Annual Report of the Blue Creek Archaeological Project, Thomas H. Guderjan and C. Colleen Hanratty, Ed., Maya Research Program and the Center for Social Science Research, April 2015. 

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