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Origins of Remote Oceania settlers

Analyzing seafaring strategies and climate impacts on ocean travel can help researchers reconstruct how humans populated one of the most remote places on Earth, according to a study*. Around 3,400 years ago, humans began crossing the Pacific Ocean to settle Remote Oceania, the far-flung collection of islands that includes Tonga, Samoa, and islands in Micronesia. Although archaeological, linguistic, and genetic evidence delimits the time of arrival of many settlers, the origins of these earliest inhabitants have proven difficult to establish. Alvaro Montenegro and colleagues analyzed ocean routes across the Pacific using computer seafaring simulations primed with high-resolution data for winds, ocean currents, precipitation, and land distribution. Additionally, accounting for the influence of the El Niño Southern Oscillation, the authors constructed “shortest-hop” trajectories to identify the most likely port of departure for the inhabitants of five major regions in Remote Oceania. Among other findings, the analysis suggests that the settlers of western Micronesia originated from a location near the Maluku Islands. The authors also compare their results with a number of previously proposed migration scenarios such as “Slow Boat to the Bismarcks,” “Voyaging Corridor Triple I,” and “Mobile Founding Migrant.” The findings demonstrate the need to incorporate Pacific Islander voyaging strategies and the impact of environmental variables on ocean travel into the analysis of colonization in Remote Oceania, according to the authors.

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 View of Kahlap islet, Mwoakilloa atoll, Eastern Caroline Islands, Micronesia.  Image courtesy of Aaron S. Poteate (North Carolina Museum of Natural Sciences, Raleigh, NC)

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 Shell adze from Mwoakilloa atoll, Eastern Caroline Islands, Micronesia.  Image courtesy of Aaron S. Poteate (North Carolina Museum of Natural Sciences, Raleigh, NC)

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Source: PNAS press release

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*“Using seafaring simulations and shortest-hop trajectories to model the prehistoric colonization of Remote Oceania” by Alvaro Montenegro, Richard Callaghan, and Scott M. Fitzpatrick.

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 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

Study finds earliest evidence in fossil record for right-handedness

UNIVERSITY OF KANSAS – LAWRENCE—Perhaps the bias against left-handers dates back much further than we thought.

By examining striations on teeth of a Homo habilis fossil, a new discovery led by a University of Kansas researcher has found the earliest evidence for right-handedness in the fossil record dating back 1.8 million years.

“We think that tells us something further about lateralization of the brain,” said David Frayer, a KU professor emeritus of anthropology and the lead author of the study. “We already know that Homo habilis had brain lateralization and was more like us than like apes. This extends it to handedness, which is key.”

The findings were published online this week in the prestigious Journal of Human Evolution. The researchers made the discovery after analyzing small cut marks, or labial striations, which are the lip side of the anterior teeth in an intact upper jaw fossil, known as OH-65, found in a stream channel of the Olduvai Gorge in Tanzania.

Frayer said among the network of deep striations found only on the lip face of the upper front teeth most cut marks veered from left down to the right. Analysis of the marks makes it likely they came from when OH-65 used a tool with its right hand to cut food it was holding in its mouth while pulling with the left hand. The scratches can be seen with the naked eye, but a microscope was used to determine their alignment and to quantify their angulation.

“Experimental work has shown these scratches were most likely produced when a stone tool was used to process material gripped between the anterior teeth and the tool occasionally struck the labial face leaving a permanent mark on the tooth’s surface,” Frayer said.

Based on the direction of the marks, it’s evident the Homo habilis was right-handed. It’s a sample of one, but because this is the first potential evidence of a dominant handed pre-Neanderthal, Frayer said, the study could lead to a search for the marks in other early Homo fossils.

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David Frayer, KU professor emeritus of anthropology, is lead author on a recent study published in the Journal of Human Evolution that found striations on teeth of a Homo habilis fossil 1.8 million years old moved from left to right, indicating the earliest evidence in the fossil record for right-handedness. Researchers believe the marks came from using a tool to try to cut food being pulled from the mouth with the left hand.  Credit: David Frayer

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“Handedness and language are controlled by different genetic systems, but there is a weak relationship between the two because both functions originate on the left side of the brain,” he said. “One specimen does not make an incontrovertible case, but as more research is done and more discoveries are made, we predict that right-handedness, cortical reorganization and language capacity will be shown to be important components in the origin of our genus.”

Multiple lines of research point to the likelihood that brain reorganization, the use of tools and use of a dominant hand occurred early in the human lineage. Today, researchers estimate that 90 percent of humans are right-handed, and this differs from apes which are closer to a 50-50 ratio. Until now, no one looked for directionality of striations in the earliest specimens representing our evolutionary lineage.

“We think we have the evidence for brain lateralization, handedness and possibly language, so maybe it all fits together in one picture,” Frayer said.

Source: University of Kansas, Lawrence, press release

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Co-authors of the study were Ronald J. Clarke, Evolutionary Studies Institute at the University of Witwatersrand, Johannesburg, South Africa; Ivana Fiore and Luca Bondioli, Polo Museale del Lazio, Museo Nazionale Preistorico Etnografico; L. Pigorini, Rome, Italy; Robert J. Blumenschine, Paleontological Scientific Trust, Johannesburg, South Africa, Alejandro Pérez-Pérez, Laura M. Martinez and Ferran Estebaranz, Department on Animal Biology, University of Barcelona, Barcelona, Spain and Ralph Holloway, Department of Anthropology, Columbia University, New York.

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 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

Ancient human history more complex than previously thought, researchers say

AMERICAN SOCIETY OF HUMAN GENETICS—BETHESDA, MD – Relationships between the ancestors of modern humans and other archaic populations such as Neanderthals and Denisovans were likely more complex than previously thought, involving interbreeding within and outside Africa, according to a new estimator developed by geneticists. Findings were reported at the American Society of Human Genetics (ASHG) 2016 Annual Meeting in Vancouver, B.C.*

In recent years, genetics has led to the revision of many assumptions about archaic populations, explained Ryan J. Bohlender, PhD, a postdoctoral researcher at the University of Texas MD Anderson Cancer Center and first author on the research. For example, the 2010 release of the Neanderthal genome led to the discovery that Neanderthals and the ancestors of modern Europeans interbred. A few years later, scientists discovered the existence of Denisovans, a population known of only through genetics, through a fossilized sample of DNA.

“My colleagues and I set out to find out what we might share with these ancient populations and how our histories interacted,” Dr. Bohlender said. They developed an estimation tool to model these interactions based on parameters such as current estimates of population size and dates when populations separated – how long ago they stopped interbreeding – and look for inconsistencies with information known from genetic studies about the overlap between the modern human genome and those of ancient populations. Compared to previous estimators, this one made increased use of genetic data to cut down on statistical bias. The researchers then allowed estimates of population size and separation dates to vary in a series of simulations, in order to find out if adjusting these parameters better fit the genetic data.

“Using this process, we found that the population in Africa was likely about 50 percent larger than previously thought. We also found that an archaic-modern human separation date of 440,000 years ago was the best fit, suggesting that Neanderthals diverged from our lineage 100,000 years more recently than we thought,” Dr. Bohlender said. “We got the same separation date using data from multiple modern human populations, which is a good sign.”

In addition, their results suggest that throughout Eurasia, ancient populations interbred less than previously believed, and that – contrary to previous findings – the level of mixing with Neanderthals did not differ significantly between Europe and East Asia.

The findings bring up many new questions, including to what extent the new estimator can be trusted, why it produces results that differ from prevailing estimates, and how to reconcile these differences.

“Overall, our findings confirm the human family tree is more complicated than we think it is,” Dr. Bohlender said. “For example, other archaic populations are likely to have existed, like the Denisovans, who we didn’t know about except through genetics.” They plan to try out simulations with multiple other populations, to see if this adds some clarity to the results.

Dr. Bohlender also believes that more detailed studies of African populations may shed some light. “Africans have been underrepresented in genetics research – they’re not as well studied as European and Asian populations, yet they are more diverse genetically than any other group,” he said.

Source: American Society of Human Genetics press release

Cover Image, Top Left: DNA Extraction in the lab – Image from U.S. Fish and Wildlife Service — Northeast Region

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*Bohlender R et al. (2016 Oct 20). A complex history of archaic admixture in modern humans. Presented at the American Society of Human Genetics 2016 Annual Meeting. Vancouver, B.C., Canada.

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Archaeologists use drones to trial virtual reality

AUSTRALIAN NATIONAL UNIVERSITY—Archaeologists at The Australian National University (ANU) and Monash University are conducting a trial of new technology to build a 3D virtual-reality map of one of Asia’s most mysterious sites – the Plain of Jars in Laos.

Researcher Dr Dougald O’Reilly from the ANU School of Archaeology and Anthropology said the technology, known as CAVE2™ and based out of Monash University, uses drone footage to create a virtual replica of archaeology dig sites.

“On top of mapping the three dig sites, we are doing the entire Plain of Jars landscape,” Dr O’Reilly said.

“A drone captures a set of 3D images every 10 centimetres and this data is put into a digital mould.

“You put on a headset and the virtual model feels like you’re standing and walking around the site. As you move around the image moves as if you are at the location.”

Ground penetrating radar was also used to identify a burial which researchers then excavated. That data was also fed into CAVE2™ to create a 3D underground view.

Dr O’Reilly said it was possible for the technology to be adapted to smartphones, or to do 3D printing of the digital models.

“It provides easy access to remote faraway places. Theoretically you could use the headset with your phone to visit a 3D map of any location,” he said.

“You could print a life-sized version of any CAVE2™ model. You could use them in museums rather than disrupting the archeologically record by moving artefacts.”

Dr O’Reilly said the technology could be a great benefit to the field of archaeology.

“It allows you to revisit the site. Even right now I’m using it to look at the positioning of some of the materials I’m having radio-carbon dated,” he said.

“In terms of heritage preservation it’s a useful tool. If you want to monitor the change in heritage sites through time you have that data.”

The Plain of Jars was chosen as a test site for CAVE2™ due to the current application to have the site listed as a UNESCO World Heritage site.

The Plain of Jars dig project in central Laos is the first major archaeological dig at the site since the 1930s. The landscape features ancient carved stone jars up to three metres tall, their purpose remains a mystery.

The site features a number of the large stone jars for which the site is named, as well as a big sandstone disk and large quartz stones.

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 Archaeology at work at the Plain of Jars. Credit: ANU

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A primary burial at the Plain of Jars site. Credit: ANU 

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The project was jointly led by Dr O’Reilly and Dr Louise Shewan, Monash University.

Dr Shewan said the technology will become useful for investigating sites that are not accessible for traditional archaeological methods, due to issues such as unexploded land mines.

“Of the over 80 known jar sites in Laos, only seven have been cleared of explosives,” she said.

Source: Australian National University press release

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winter2016ebookcover

 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

Extensive heat treatment in Middle Stone Age silcrete tool production in South Africa

PLOS—Humans living in South Africa in the Middle Stone Age may have used advanced heating techniques to produce silcrete blades, according to a study published October 19, 2016 in the open-access journal PLOS ONE by Anne Delagnes from the CNRS (PACEA – University of Bordeaux, France) and colleagues.

Middle Stone Age humans in South Africa developed intentional heat treatment of silcrete rock over 70,000 years ago to facilitate the flaking process by modifying the rock properties – the first evidence of a transformative technology. However, the exact role of this important development in the Middle Stone Age technological repertoire was not previously clear. Delagnes and colleagues addressed this issue by using a novel non-destructive approach to analyze the heating technique used in the production of silcrete artifacts at Klipdrift Shelter, a recently discovered Middle Stone Age site located on the southern Cape of South Africa, including unheated and heat-treated comparable silcrete samples from 31 locations around the site.

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Humans living in South Africa in the Middle Stone Age may have used advanced heating techniques to produce silcrete blades, according to a study published Oct. 19, 2016 in the open-access journal PLOS ONE by Anne Delagnes from the CNRS (PACEA – University of Bordeaux, France) and colleagues.  Credit:  Delagnes et al (2016)

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The authors noted intentional and extensive heat treatment of over 90% of the silcrete, highlighting the important role this played in silcrete blade production. The heating step appeared to occur early during the blade production process, at an early reduction stage where stone was flaked away to shape the silcrete core. The hardening, toughening effect of the heating step would therefore have impacted all subsequent stages of silcrete tool production and use.

The authors suggest that silcrete heat treatment at the Klipdrift Shelter may provide the first direct evidence of the intentional and extensive use of fire applied to a whole lithic chain of production. Along with other fire-based activities, intentional heat treatment was a major asset for Middle Stone Age humans in southern Africa, and has no known contemporaneous equivalent elsewhere.

Source: PLOS press release

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*Delagnes A, Schmidt P, Douze K, Wurz S, Bellot-Gurlet L, Conard NJ, et al. (2016) Early Evidence for the Extensive Heat Treatment of Silcrete in the Howiesons Poort at Klipdrift Shelter (Layer PBD, 65 ka), South Africa. PLoS ONE 11(10): e0163874. doi:10.1371/journal.pone.0163874

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winter2016ebookcover

 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

Monkeys are seen making stone flakes

UNIVERSITY OF OXFORD—Researchers have observed wild-bearded capuchin monkeys in Brazil deliberately break stones, unintentionally creating flakes that share many of the characteristics of those produced by early Stone Age hominins. The difference is that the capuchins’ flakes are not intentional tools for cutting and scraping, but seem to be the by-product of hammering or ‘percussive behaviour’ that the monkeys engage in to extract minerals or lichen from the stones.

In a paper, published in Nature, the research team says this finding is significant because archaeologists had always understood that the production of multiple stone flakes with characteristics such as conchoidal fractures and sharp cutting edges was a behaviour unique to hominins. The paper suggests that scholars may have to refine their criteria for identifying intentionally produced early stone flakes made by hominins, given capuchins have been observed unintentionally making similar tools.

The research is authored by researchers from the University of Oxford, University College London and University of São Paulo in Brazil. The team observed individual monkeys in Serra da Capivara National Park unintentionally creating fractured flakes and cores. While hominins made stone flake tools for cutting and butchery tasks, the researchers admit that it is unclear why monkeys perform this behaviour. They suggest that the capuchins may be trying to extract powdered silicon (known to be an essential trace nutrient) or to remove lichen for some as yet unknown medicinal purpose. At no point did the monkeys try to cut or scrape using the flakes, says the study.

Lead author Dr Tomos Proffitt, from the School of Archaeology at the University of Oxford, comments: ‘Within the last decade, studies have shown that the use and intentional production of sharp-edged flakes are not necessarily linked to early humans (the genusHomo) who are our direct relatives, but instead were used and produced by a wider range of hominins. However, this study goes one step further in showing that modern primates can produce archaeologically identifiable flakes and cores with features that we thought were unique to hominins.

‘This does not mean that the earliest archaeological material in East Africa was not made by hominins. It does, however, raise interesting questions about the possible ways this stone tool technology developed before the earliest examples in the archaeological record appeared. It also tells us what this stone tool technology might look like. There are important questions too about the uniqueness of early hominin behaviour. These findings challenge previous ideas about the minimum level of cognitive and morphological complexity required to produce numerous conchoidal flakes.’

The monkeys were observed engaging in ‘stone on stone percussion’, whereby they individually selected rounded quartzite cobbles and then using one or two hands struck the ‘hammer-stone’ forcefully and repeatedly on quartzite cobbles embedded in a cliff face. This action crushed the surface and dislodged cobbled stones, and the hand-held ‘hammer stones’ became unintentionally fractured, leaving an identifiable primate archaeological record. As well as using the active hammer-stone to crush ‘passive hammers’ (stones embedded in the outcrop), the capuchins were also observed re-using broken hammer-stones as ‘fresh’ hammers.

The research team examined 111 fragmented stones collected from the ground immediately after the capuchins had dropped them, as well as from the surface and excavated areas in the site. They gathered complete and broken hammer-stones, complete and fragmented flakes and passive hammers. Around half of the fractured flakes exhibited conchoidal fracture, which is typically associated with the hominin production of flakes.

Bearded capuchins and some Japanese macaques are known to pound stones directly against each other, but the paper remarks that the capuchins in Serra da Capivara National Park are the only wild primates to be observed doing this for the purpose of damaging the stones.

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 Wild-bearded capuchin monkey in Serra da Capivara National Park, Brazil, unintentionally creating fractured flakes and cores. Credit: Michael Haslam/ Primate Archaeology Group

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Co-author and leader of the Primate Archaeology (Primarch) project Michael Haslam, from the University of Oxford, says: ‘Our understanding of the new technologies adopted by our early ancestors helps shape our view of human evolution. The emergence of sharp-edged stone tools that were fashioned and hammered to create a cutting tool was a big part of that story. The fact that we have discovered monkeys can produce the same result does throw a bit of a spanner in the works in our thinking on evolutionary behaviour and how we attribute such artefacts. While humans are not unique in making this technology, the manner in which they used them is still very different to what the monkeys seem capable of.’

Source: University of Oxford press release

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winter2016ebookcover

 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

The Higgs Bison: Mystery species hidden in cave art

UNIVERSITY OF ADELAIDE—Ancient DNA research has revealed that Ice Age cave artists recorded a previously unknown hybrid species of bison and cattle in great detail on cave walls more than 15,000 years ago.

The mystery species, known affectionately by the researchers as the Higgs Bison* because of its elusive nature, originated over 120,000 years ago through the hybridisation of the extinct Aurochs (the ancestor of modern cattle) and the Ice Age Steppe Bison, which ranged across the cold grasslands from Europe to Mexico.

Research led by the Australian Centre for Ancient DNA (ACAD) at the University of Adelaide, published today in Nature Communications, has revealed that the mystery hybrid species eventually became the ancestor of the modern European bison, or wisent, which survives in protected reserves such as the Bia?owie?a forest between Poland and Belarus.

“Finding that a hybridization event led to a completely new species was a real surprise – as this isn’t really meant to happen in mammals,” says study leader Professor Alan Cooper, ACAD Director. “The genetic signals from the ancient bison bones were very odd, but we weren’t quite sure a species really existed – so we referred to it as the Higgs Bison.”

The international team of researchers also included the University of California, Santa Cruz (UCSC), Polish bison conservation researchers, and palaeontologists across Europe and Russia. They studied ancient DNA extracted from radiocarbon-dated bones and teeth found in caves across Europe, the Urals, and the Caucasus to trace the genetic history of the populations.

They found a distinctive genetic signal from many fossil bison bones, which was quite different from the European bison or any other known species.

Radiocarbon dating showed that the mystery species dominated the European record for thousands of years at several points, but alternated over time with the Steppe bison, which had previously been considered the only bison species present in Late Ice Age Europe.

“The dated bones revealed that our new species and the Steppe Bison swapped dominance in Europe several times, in concert with major environmental changes caused by climate change,” says lead author Dr Julien Soubrier, from the University of Adelaide. “When we asked, French cave researchers told us that there were indeed two distinct forms of bison art in Ice Age caves, and it turns out their ages match those of the different species. We’d never have guessed the cave artists had helpfully painted pictures of both species for us.”

The cave paintings depict bison with either long horns and large forequarters (more like the American bison, which is descended from the Steppe bison) or with shorter horns and small humps, more similar to modern European bison.

“Once formed, the new hybrid species seems to have successfully carved out a niche on the landscape, and kept to itself genetically,” says Professor Cooper. “It dominated during colder tundra-like periods, without warm summers, and was the largest European species to survive the megafaunal extinctions. However, the modern European bison looks genetically quite different as it went through a genetic bottleneck of only 12 individuals in the 1920s, when it almost became extinct. That’s why the ancient form looked so much like a new species.”

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 A reproduction of a putative wisent painted in the Marsoulas cave (Haute-Garonne, France) during the the Magdalenian period.  Courtesy Carole Fritz

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 A black charcoal drawing of steppe bison (Bison priscus) from the Aurignacian period — Chauvet-Pont d’Arc cave (Ardeche, France)  Courtesy Carole Fritz

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Bison left metacarpal subfossil (front toe, anterior and posterior faces) from l’Aven de l’Arquet (Barjac, France) radiocarbon dated to >50,000 years ago. DNA analysis of the bone showed that this bison belonged to the newly discovered group of extinct wisent (cladeX). Collection of Musée de Préhistoire d’Orgnac (France), Evelyne Crégut-Bonnoure, Jean-Philip Brugal. Photo from Julien Soubrier 

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Professor Beth Shapiro, UCSC, first detected the mystery bison as part of her PhD research with Professor Cooper at the University of Oxford in 2001. “Fifteen years later it’s great to finally get to the full story out. It’s certainly been a long road, with a surprising number of twists,” Professor Shapiro says.

Source: University of Adelaide press release

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*The Higgs Boson is a subatomic particle suspected to exist since the 1960s and only confirmed in 2012.

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winter2016ebookcover

 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

Ancient hominid ‘hanky panky’ also influenced spread of STIs

MOLECULAR BIOLOGY AND EVOLUTION (OXFORD UNIVERSITY PRESS)—With recent studies proving that almost everyone has a little bit of Neanderthal DNA in them—-up to 5 percent of the human genome— it’s become clear our ancestors not only had some serious hominid ‘hanky panky’ going on, but with it, a potential downside: the spread of sexually transmitted infections, or STIs.

For wherever life goes, germs are soon to follow.

In the case of the most common STI, human papillomaviruses (HPVs), almost everyone hosts a number of infections, with strain HPV16 responsible for most cervical and oral cancers.

By reconstructing the ancestry and timing of the family tree of HPV16 in greater detail than ever before, and by comparing the evolutionary histories of viruses and humans, a new pattern has emerged. Now, researchers have generated compelling evidence that HPV16 co-diverged with archaic and modern humans—only to be repopulated at a much later date through their contact by Neanderthals, challenging the assumption that HPV16 co-evolved with modern humans. The study, by Ville Pimenoff at the Catalan Institute of Oncology and Ignacio Bravo at the French National Center for Scientific Research was published in the advanced online edition of Molecular Biology and Evolution (DOI: 10.1093/molbev/msw214).

During the evolution of HPV16, variants A and B/C/D co-diverged with archaic and modern humans, respectively. When populations of modern humans left Africa and had sexual intercourse with Neanderthals and Denisovans, they were infected by the viral variant that had evolved with archaic humans, and this virus thrived and expanded among modern humans

This scenario finally explains unsolved questions: why human diversity is largest in Africa, while HPV16 diversity is largest in East-Asia, and why the HPV16A variant is virtually absent in Sub-Saharan Africa while it is by far the most common one in the rest world.

“Oncogenic viruses are very ancient,” said Ignacio Bravo. “The history of humans is also the history of the viruses we carry and we inherit. Our work suggests that some aggressive oncogenic viruses were transmitted by sexual contact from archaic to modern humans.”

They propose that interactions between the host and viral genomes may explain why most humans are exposed to HPVs and cure the infection, while in a few unfortunate cases the infection persists and can lead to cancer. The different degree of archaic ancestry in our genomes could be partly responsible for differential susceptibility to cancer. Since HPVs do not infect bones, current Neanderthal and Denisovan genomes do not contain HPVs. As a next step, the authors hope to trace HPVs sequences in ancient human skin remains as a more direct test of their hypothesis.

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 Cover image: The original “Old man of Cro-Magnon”, Musée de l’Homme, Paris.  120, Wikimedia Commons

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Source: Oxford University press release

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Agriculture development and environmental records during Neolithic Age in north China

SCIENCE CHINA PRESS—China has a long tradition of agriculture production. Millet crops including foxtail millet and broomcorn millet were firstly domesticated in north China, and thereafter the development of millet-based agriculture (also called “rain-fed” agriculture) provided an important foundation for the emergence of ancient Chinese civilization, which might have also exerted an unprecedented impact on natural environments.

Previous studies revealed that the Yangtse River valley of south China and the Yellow River valley of north China were the original center of rice agriculture and rain-fed agriculture respectively. The history for the development of rain-fed agriculture during the Neolithic period has been intensively concerned, for central north China was the cradle for the origin of ancient Chinese civilization in the early 4th Millennium BP (Before present). Archaeologists have summarized the timeline for the development of rain-fed agriculture in Neolithic China, based on archaeobotanical evidences, while the space variation in this process has not been adequately studied and the spatial-temporal intensification and expansion of rain-fed agriculture in the Neolithic Age remains unclear.

The impact of slash-and-burn cultivation on the surrounding environments after the emergence of intensive rain-fed agriculture in China has also not been well understood due to the lack of interdisciplinary studies, for example, the cross-over studies between archaeology and earth sciences. The issue is valuable for the discussion of the hot-topic argument for the “Anthropocene”, which is nominated as a new geological epoch. Some scholars argue for the onset of the Anthropocene between 1945-1964 AD, when intensive atmospheric nuclear testing resulted in peak values of Carbon14, widely recorded in tree rings and sediments, while other scholars have argued its beginning may be traced back to the early Holocene. This latter argument is related to the beginnings of significant landscape modification through the development and spread of agricultural practices in the Old World since 10,000 BP.

In an article* coauthored by Guanghui Dong, Shanjia Zhang, Yishi Yang, Jianhui Chen and Fahu Chen, scholars at the MOE Key Laboratory of Western China’s Environmental System, Lanzhou University, suggest the intensification and expansion of agriculture during the Neolithic Age in northern China and its imprints in paleo-environmental records has been detected, based on the comparative analysis of multidisciplinary evidences.

These five scholars review the results of archaeobotanical and dating studies, and carbon isotope analysis of human bones from Neolithic sites, comparing them with black carbon content from palaeoenvironmental records in northern China. Based on this study, they conclude that millet cultivation was an auxiliary subsistence strategy in northern China from 10,000 to 7000 BP, with hunting-gathering the primary subsistence strategy, and that the earliest millet-cultivation might have emerged in eastern Inner Mongolia post 7700 BP. Millet cultivation transitioned from a secondary strategy to become dominant in the Guanzhong area of north-central China during 7000-6000 BP, and probably facilitated the development of early Yangshao culture in the middle reaches of the Yellow River valley. Intensive millet-based agriculture emerged and widely expanded across the Yellow River valley in northern China during 6000-4000 BP. This promoted rapid population growth and cultural evolution in the late Neolithic period, and was key to the subsequent emergence of the ancient Chinese civilization. The temporal-spatial variation of black carbon (EC-soot) corresponds well with the intensification and expansion of millet-based agriculture during Neolithic period, suggesting intensive millet agriculture production activities exerted evident impact on fire frequency in northern China.

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chinaagriculture

 Artist illustration of slash-and-burn cultivation during the Neolithic Age. Courtesy Science China Press

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This work provides a valuable case study for understanding the temporal and spatial development of millet agriculture, and human-environment interactions in northern China during the Neolithic period from an Anthropocene perspective.

Source: Adapted and edited from the subject Science China Press news release

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*Dong G H, Zhang S J, Yang Y S, Chen J H, Chen F H. Agricultural intensification and its impact on environment during Neolithic Age in northern China (in Chinese). Chin. Sci. Bull., 2016, 61: 2913-2925, doi: 10.1360/N972016-00547.

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Unique skin impressions of the last dinosaurs discovered in Barcelona

UNIVERSITAT AUTONOMA DE BARCELONA—A geological research conducted in the village of Vallcebre, near Barcelona, to study the origins of rock sediments from the Late Cretaceous period (approx. 66 million years ago) has revealed an extraordinary artifact. Researchers discovered the impression of skin scales left by a dinosaur which had lain down in the mud. During that period, the area was a muddy region corresponding to the banks of a river. As chance had it, that muddy region where the animal’s scales had left their mark was later covered with sand which, in the course of thousands of years, finally petrified to form sandstone and thus become the sedimentary rock which preserves the impression recently discovered by the researchers. The sand acted as a mould and therefore, what actually can be seen on the rock is not really the impression, but the relief of the animal’s original skin.

The characteristics of the discovery are unique, given that the Late Cretaceous period corresponds to the moment short before dinosaurs became extinct, there are few places on Earth containing sandstone from this period, and characterizing these dinosaurs is very important in order to understand how and why they disappeared. “This is the only registry of dinosaur skin from this period in all of Europe, and it corresponds to one of the most recent specimens, closer to the extinction event, in all of the world”, highlights UAB researcher Victor Fondevilla, main author of the research. “There are very few samples of fossilized skin registered, and the only sites with similar characteristics can be found in United States and Asia”, Fondevilla states. He goes on to say: “Other dinosaur skin fossils have been found in the Iberian Peninsula, in Portugal and Asturias, but they correspond to other more distant periods”.

The shape of the scales observed on the rock show a pattern characteristic of the skin of some dinosaurs: in a form of a rose with a central bump in the shape of a polygon, surrounded by five or six more bumps. However, the scales are large, too large for the typical size of carnivorous dinosaurs and hadrosaurs roaming this area 66 million years ago. “The fossil probably belongs to a large herbivore sauropod, maybe a titanosaurus, since we discovered footprints from the same species very close to the rock with the skin fossil” Fondevilla says.

In fact, two skin impressions were found, one measuring approximately 20 centimetres wide, and the other slightly smaller, measuring only 5 centimetres wide, separated by a 1.5 metre distance and probably made by the same animal. “The fact that they are impression fossils is evidence that the animal is from the sedimentary rock period, one of the last dinosaurs to live on the planet. When bones are discovered, dating is more complicated because they could have moved from the original sediment during all these millions of years”, Fondevilla states.

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skinimpression

 Dinosaur skin impression on rock. Credit: Jordi Pareto/UAB

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titanosaure

 Reconstruction of a titanosaurus.  Credit: Oscar Sanisidro/Institut Català de Paleontologia Miquel Crusafont 

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The finding verifies the excellent fossil registry of the Pyrenees in terms of dinosaurs living in Europe little before they became extinct throughout the planet. “The sites in Berguedà, Pallars Jussà, Alt Urgell and La Noguera, in Catalonia, have provided proof of five different groups of dinosaurs: titanosaurs, ankylosaurids, theropods, hadrosaurs and rhabdodontids”, explains Àngel Galobart, head of the Mesozoic research group at the ICP and director of the Museum of Conca Dellà in Isona. “The sites in the Pyrenees are very relevant from a scientific point of view, since they allow us to study the cause of their extinction in a geographic point far away from the impact of the meteorite”, Galobart explains.

The research, published in Geological Magazine, was led by Víctor Fondevilla and Oriol Oms from the UAB Department of Geology, in collaboration with Bernat Vila and Àngel Galobart, both from the Institut Català de Paleontologia Miquel Crusafont (ICP) and the Museum of Conca Dellà.

Source: Universitat Autonoma de Barcelona news release.

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Scientists map genome of African diaspora in the Americas

UNIVERSITY OF COLORADO ANSCHUTZ MEDICAL CAMPUS—AURORA, Colo. (Oct. 11, 2016) – Researchers at the University of Colorado Anschutz Medical Campus along with colleagues at Johns Hopkins University and other institutions have conducted the largest ever genome sequencing of populations with African ancestry in the Americas.

The scientists, for the first time, have created a massive genetic catalog of the African diaspora in this hemisphere. It offers a unique window into the striking genetic variety of the population while opening the door to new ways of understanding and treating diseases specific to this group.

The study was published today in the journal Nature Communications.

“The African Diaspora in the Western Hemisphere represents one of the largest forced migrations in history and had a profound impact on genetic diversity in modern populations,” said the study’s principal investigator Kathleen Barnes, PhD, director of the Colorado Center for Personalized Medicine at CU Anschutz. “Yet this group has been largely understudied.”

Barnes said those of African ancestry in the Americas suffer a disproportionate burden of disability, disease and death from common chronic illnesses like asthma, diabetes and other ailments. The reasons why, remain largely unknown.

With that question in mind Barnes and her colleagues, with support from the NIH’s National Heart, Lung and Blood Institute, created the `Consortium on Asthma among African-ancestry Populations in the Americas’ or CAAPA. They sequenced the genome of 642 people of African ancestry from 15 North, Central and South American and Caribbean populations plus Yoruba-speaking individuals from Ibadan, Nigeria. The ultimate goal of the study is to better understand why they are more susceptible to asthma in the Americas. But the result was a wide-ranging genetic catalogue unlike any other.

The African genome is the oldest and most varied on earth. Africa is where modern humans evolved before migrating to Europe, Asia and beyond.

Barnes and her team are finding changes in the DNA of Africans in the Americas that put them at higher risk for certain diseases. Perhaps one reason for this is the amount of genetic material they carry from other populations including those of European ancestry and American Indians.

“Patterns of genetic distance and sharing of single nucleotide variations among these populations reflect the unique population histories in each of the North, Central and South American and Caribbean island destinations of West African slaves, with their particular Western European colonial and Native American populations,” the study said.

For example, the researchers showed that the mean African ancestry varied widely among populations depending on where they were settled, from 27% of Puerto Ricans to 89% of Jamaicans. In places like the Dominican Republic, Brazil, Honduras and Colombia there was also significant Native American ancestry as well.

Untangling this genetic history will take years, but Barnes said the catalogue is a good start. The data will serve as an important resource for disease mapping studies in those with African ancestry.

“This will contribute to the public database and give clinicians more information to better predict and track human disease,” Barnes said. “It will allow us to tailor clinical to specific individuals based on their ethnic and racial backgrounds.”

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blackportrait

 Black Bashi-Bazouk: Oil on canvas in the Metropolitan Museum of Art ,2008: given by Mrs. Charles Wrightsman

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A companion paper demonstrating the clinical utility of the African diaspora genome catalog appears in the same issue of Nature Communications.

Source: University of Colorado Anschutz Medical Campus press release.

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Lifting the veil on Queen of Sheba’s perfume

It is one of the oldest fragrances in the world. Nicolas Baldovini’s team at the Institut de chimie de Nice (CNRS/UNS) has just discovered the components that give frankincense its distinctive odor: two molecules found for the first time in nature, named “olibanic acids” by the scientists. Their research results* have just been published online, on the website of the journal Angewandte Chemie International Edition.

It is mentioned more than twenty times in the Bible, where it is one of the gifts offered by the Three Wise Men. Frankincense (also called olibanum1), one of the world’s oldest fragrances, is a gum resin that exudes from the bark of Boswellia trees, which grow in countries bordering the Red Sea and the Gulf of Aden. It has been used for more than 6,000 years by every civilization, from Mesopotamia to the present. Regularly burned during religious ceremonies, it contributes to the very particular smell of churches. Despite its long history and the large amount of research dedicated to it, the exact nature of the molecules that give frankincense its distinctive fragrance surprisingly remained unknown.

Nicolas Baldovini and his team at the Institut de chimie de Nice (CNRS/UNS), which specializes in fragrances, have just succeeded in identifying them for the first time. The chief difficulty lay in finding methods of analysis precise enough to characterize these odorous substances, which are present in the fragrance in very small quantities (a few hundred ppm2), and therefore all the more difficult to detect.

To do so, the researchers used three kilos of essential oil of frankincense from Somalia, from which they isolated a purified sample of approximately 1 mg of two odorant constituents, through a series of distillations, extractions, and chromatography analyses. A group of researchers trained to recognize the typical odor of frankincense proved necessary to assist in this work, for only the human nose is sensitive enough to detect these constituents in small quantities in a mixture. The team then had to determine the molecular structure of these substances using nuclear magnetic resonance (NMR, the equivalent of an MRI applied to molecules). The two molecules, which give frankincense its “old church” smell have been identified as (+)-trans- and (+)-cis-2- octylcyclopropyl-1-carboxylic acids. Moreover, this is the first time that these compounds have been discovered in nature. In order to irrefutably confirm their characterization established using spectral analysis, the team then synthesized each of these components—which they named “olibanic acids” (from olibanum, another name for frankincense)—and used synthesis to demonstrate they were identical to the natural components.

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frankincensegumresin2

 Frankincence gum resin. Courtesy Société Albert Vieille

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Thanks to this discovery, perfume makers can now produce these molecules artificially in unlimited amounts, and use them in different perfumes. 

Source: Press release of the CNRS and the Université Nice Sofia Antipolis

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Notes

1 Olibanum, a medieval Latin word, derives from the Greek ho libanos.
2 Ppm: parts per million.

*Olibanic Acids as Key Odorants of Frankincense. Céline Cerutti-Delasalle, Mohamed Mehiri, Cecilia Cagliero, Patrizia Rubiolo, Carlo Bicchi, Uwe J. Meierhenrich and Nicolas Baldovini. Angewandte Chemie International Edition. Published online on October 4, 2016 (print version forthcoming).
DOI: 10.1002/anie.201605242R2

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Uncovering Mysteries on the Isle of Mull

As Founder and Editor of Popular Archaeology Magazine, Dan is a freelance writer and journalist specializing in archaeology.  He studied anthropology and archaeology in undergraduate and graduate school and has been an active participant on archaeological excavations in the U.S. and abroad.  He is the creator and administrator of Archaeological Digs, a popular weblog about archaeological excavation and field school opportunities.  

In the summer of 2016, a small team of archaeologists and field school students could be seen carefully working the earth at the base of a steep slope on an island off the west coast of Scotland. The island, known as Mull, is one among 79 other islands in the Inner Hebrides, an archipelago just off Scotland’s picturesque west coast.

Life on Mull is simple, steeped in commercial traditions of fishing, crofting, and whisky distilling. But it also draws tourists for its picturesque seaside beauty, the colorful houses of Tobermory village, and the Tobermory distillery — including other visual remnants of a past that goes back hundreds, even thousands, of years. 

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tobermorytorstenhenning

 A view of Tobermory. Torsten Henning, Wikimedia Commons

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The archaeological team, under the auspices of the Heritage and Archaeological Research Practice (HARP) in collaboration with the Mull Archaeology Interest Group (MAIG), is investigating the remains of a small historic settlement known as Kildavie in the North West Mull Community Woodland of Langamull. No one has lived in this place for hundreds of years, but it was occupied in the 17th and 18th centuries. The remains of sixteen buildings have been identified thus far. The archaeologists suggest they were primarily domestic dwellings, with perhaps some evidence of a cottage industry.

“There is archaeological and historic evidence that Kildavie was a domestic settlement in the 17th and 18th centuries until it was abandoned at the beginning of the 19th century,” says Kate Leonard, an archaeologist who was working at the site during the summer of 2016. “The reason for its final abandonment is unknown, as is the origin of the settlement.”

But digging and research at the site could provide some clues for answers. Who were these people and why did they leave?

There is no written history of this settlement. But some historical context could help frame the inquiry. 

“While there is a grand narrative about the Highland Clearances in this part of the country – with some very real and harrowing accounts to go along with it – the story is not straightforward in every case,” continues Leonard. “While some people were quickly forced out of their homes, other places were more gradually abandoned and Kildavie may be one of these.”  

The Highland Clearances saw the forced eviction or displacement in the 18th and 19th centuries by aristocratic landowners of a large number of people or crofters, people who made their living as tenant farmers of small parcels of land. The landowners required the land to be converted to use as grazing area for the new agricultural revolution — sheep raising and herding. Many of the evictions were brutal, and the actions had the effect of depopulating the Hebrides and displacing them to other areas of Scotland and even other countries and continents, such as the Americas and Australasia. It profoundly impacted the indigenous Gaelic culture.  

Was the fate of Kildavie the result of the Clearances?

The archaeology at the site has yet to answer this question. In the meantime, however, digging and analysis can provide clues to how these people lived and what their settlement may have looked like in the 17th and 18th centuries. 

“By excavating as wide a variety of structures as possible the team hopes to identify differences in dates of occupation and use of the structures,” says Leonard. 

“The team is also investigating the possibility that one or two of the structures were built for something other than a domestic dwelling; for instance, for a cottage industry. It also seems that some buildings were ‘renovated’ and re-used for another purpose. This type of later reuse can be seen in the small dividing walls built in some of the structures, possibly after they went out of use as a home.”

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kildavie3

 Sheep: A common site in the excavation area. Photo courtesy Kate Leonard 

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kildavie2

 The archaeological team at work on site. Photo courtesy Kate Leonard

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 Revealing unwritten history through archaeology: Investigation of the structures and the associated artifacts will help shed light on the functions of the structures and the lives of the people who once occupied them. Photo courtesy Kate Leonard

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Leonard’s group excavated two small trenches. They were exploring the construction of walls and the entrance of a dry-stone built structure. “By the end of the dig we had exposed the floor layer in one trench and had revealed the structure of the wall in the other.” 

Work at the site has been an ongoing endeavor, and the team has set its sights ahead.

Concludes Leonard, “there is more work to be done and the trenches will be reopened next season so the questions we have will still be investigated.”

To learn more about the dig at Kildavie (and the other excavations HARP organizes), see their website. http://www.harparchaeology.co.uk/

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Leonard’s time at the excavation was for but a brief period. She moves on to Hawaii, where she will be participating in another project as part of a global year-long journey to work at twelve different archaeological sites in 12 separate countries. She calls her project Global Archaeology: A Year of Digs. Kildavie was the 9th stop on her global trek. 

Popular Archaeology will be following and reporting on Leonard’s worldwide experiences periodically throughout 2016 as she hops from one location to another during her global journey. To continue the work, however, Leonard will need financial support from donors. Readers interested in reading about and supporting her self-directed Global Archaeology crowdfunded project can learn more at gofundme.com/globalarchaeology.

You can read more about Leonard’s experience at Kildavie here.

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Archaeologists unveil new findings from Greek warrior’s tomb

UNIVERSITY OF CINCINNATI—When University of Cincinnati researchers uncovered the tomb of a Bronze Age warrior—left untouched for more than 3,500 years and packed with a spectacular array of precious jewelry, weapons and riches—the discovery was hailed by experts as “the find of a lifetime.”

Now, only a year after archaeologists completed the excavation, new understandings of the artifacts—particularly the discovery of four golden rings—and the insights they provide to the origins of Greek civilization may prove to be the team’s next big discovery.

Shari Stocker, a senior research associate in UC’s Department of Classics, and Jack Davis, the university’s Carl W. Blegen chair in Greek archaeology, will reveal the UC-based team’s findings from the so-called “Griffin Warrior” grave Thursday, Oct. 6, at The American School of Classical Studies at Athens, Greece.

The husband-and-wife team’s highly anticipated lecture is generating worldwide attention, including a feature in the New York Times.

The ‘find of a lifetime’

Stocker and Davis, along with other UC staff specialists and students, stumbled upon the remarkably undisturbed and intact tomb last May while excavating near the city of Pylos, an ancient city on the southwest coast of Greece.

Inside they discovered the well-preserved remains of what is believed to have been a powerful Mycenaean warrior or priest in his early- to mid-30s who was buried around 1500 B.C. near the archeological excavation of the Palace of Nestor.

Immortalized in Homer’s “Odyssey,” the large administrative center was destroyed by fire sometime around 1180 B.C., but remains the best-preserved Bronze Age palace on the Greek mainland. UC archaeologist Carl Blegen first discovered the Mycenaean ruins in 1939, where he unearthed a number of clay tablets written in Linear B script, the earliest known written form of Greek.

The warrior’s tomb, hailed by the Greek Culture Ministry as the “most important to have been discovered [in continental Greece] in 65 years,” revealed more than 2,000 objects arrayed on and around the body, including four solid gold rings, silver cups, precious stone beads, fine-toothed ivory combs and an intricately built sword, among other weapons.

The skeleton was dubbed the “Griffin Warrior” for the discovery of an ivory plaque adorned with a griffin—a mythical beast with the body of a lion and the head and wings of an eagle—buried with him.

The UC excavation is remarkable not just for the unparalleled riches discovered in the warrior-priest’s tomb—to find an unlooted, intact grave is, in itself, a rare and historic feat—but for what the grave and its bounty reveals about the dawn of the Mycenaean civilization, a transformative period in the Bronze Age.

Unlocking an ancient mystery

A significant number of the artifacts found in the warrior’s grave were made by Minoans, a culturally dominant civilization to the Mycenaeans that arose on the large island of Crete, southeast of Pylos. How then, the researchers puzzled, did a man from the Greek mainland accumulate such a large cache of Minoan-made riches?

One longstanding theory is that the Greeks of the Griffin Warrior’s era—dubbed Mycenaean after their principal city, Mycenae—are thought to have imported or robbed the riches from the affluent non-Greek Minoan civilization on Crete.

“The grave was right around the time the Mycenaeans were conquering the Minoans,” explained Stocker. “We know that there were extensive raids and shortly after the date of our grave, Minoan-Crete fell to the Mycenaeans.”

But Stocker and Davis say that the artifacts found in the warrior’s grave suggest a far greater cultural sharing between the ancient civilizations than just mere plunder. Instead, they insist, the carefully selected and hand-placed items reveal much about the heart of the relationship of the burgeoning mainland Greek culture to the more refined culture of Crete.

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shafttomb

 Sharon Stocker stands within the excavated shaft tomb. Courtesy University of Cincinnati, Department of Classics, Pylos Excavations

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History revealed through remarkable rings

The discovery of four gold signet rings bearing highly detailed Minoan iconography offers one of the best examples of this Mycenaean-Minoan cultural transfer and paints a more vivid picture of early Greek society, the researchers say.

The rings—three of which the researchers are unveiling for the first time on Oct. 6—are crafted from multiple sheets of gold and feature iconographical references seen elsewhere in Minoan art and religious culture.

The first ring, revealed after the excavation’s completion last fall, shows a scene of a bull leaping—reminiscent of contests in which toreadors would literally leap over bulls in a show of sport and athletic prowess—a common motif seen in Minoan imagery.The second ring, the second largest gold signet ring known in the Aegean world, shows five elaborately dressed female figures gathered by a seaside shrine.A third ring depicts a female figure, thought to be a goddess, holding a staff and flanked by two birds atop a mountain glen.The final ring shows a woman presenting a bull’s horn offering to a goddess holding a mirror and seated on a high-backed throne atop of which is perched a bird.

Cultural meanings aside, the rings themselves are a remarkable find simply for the elaborate attention to detail and artisan workmanship, say Stocker and Davis.

“They’re carving these before the microscope and electric tools,” marveled Stocker. “This is exquisite workmanship for something so tiny and old and really shows the skill of Minoan craftsmen.”

“It shows a level of superb craftsmanship that just isn’t found on these other rings,” said Davis, referring to the rings of Minos and Nestor, long the subjects of intense scrutiny by experts who question their authenticities, in part, due to the high level of detail on them.

But the discovery of the Minoan-style rings in a Mycenaean warrior’s grave further left the research team scratching their heads: Did the Mycenaeans understand what they were taking from the Minoans and the concepts behind the iconography?

After a year of careful examination of the grave’s artifacts, Davis and Stocker now say yes.

“People have suggested that the findings in the grave are treasure, like Blackbeard’s treasure, that was just buried along with the dead as impressive contraband,” said Davis. “We think that already in this period the people on the mainland already understood much of the religious iconography on these rings, and they were already buying into religious concepts on the island of Crete.”

“This isn’t just loot,” he added. “It may be loot, but they’re specifically selecting loot that transmits messages that are understandable to them.”

“They’re not just going there and robbing a jewelry store,” echoed Stocker. “They’re thinking about it and selecting specific items for inclusion in the burial.”

The researchers point to other items in the grave that reference religious and cultural motifs seen both in the rings and Minoan imagery.

A mirror found above the Griffin Warrior’s legs may relate to the fourth ring, in which a seated goddess is portrayed holding a mirror. The mirror’s placement in the grave, the researchers theorize, suggest that it holds special significance to the Mycenaeans while the presence of a half-dozen combs suggest a ritual practice of hair-combing before battle.

The bull, a sacred symbol to the Minoans, can also be seen in Mycenaean imagery. In the third ring, a goddess is featured holding a horned staff while the fourth ring shows an offering to the goddess of a bull’s horn. The bull is also featured in the first ring, suggesting the horns may have come from a ritualistic slaughtering following a bull-leaping event. Stocker and Davis say it is no coincidence that the Griffin Warrior was found buried with a bronze bull’s head staff capped by prominent horns, which were likely a symbol of his power and authority.

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mycenaeangoldring

 One of four solid gold rings found within the tomb. This one features a Cretan bull-jumping scene. Courtesy Jennifer Stephens and the University of Cincinnati, Department of Classics, Pylos Excavations

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ivorycomb

  An ivory comb, one of six, found within the tomb. Courtesy University of Cincinnati, Department of Classics, Pylos Excavations

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A snapshot captured in time

These associations and more, which the researchers plan to further explore in upcoming publications, promise to open new doors into the understanding of the nascent Mycenaean belief system at a transitional time when Minoan works first began to gain importance on the Greek mainland, Davis and Stocker say.

“What this allows us to do gets us beyond just thinking in terms of mere borrowing of prestige items or items to show off for display,” explained Davis. “This starts to get us into an understanding of actual beliefs and ideas and an ideology that existed in this time of the formation of the Mycenaean civilization, which is very difficult to get at.”

That difficulty is often compounded by the Mycenaeans’ practice of group burials for elite members of society. While other grave excavations in Mycenae have yielded even more remarkable riches, the presence of multiple corpses in those graves makes it difficult to determine what items were buried with each individual and why.

The Griffin Warrior’s tomb contains just one skeleton, which researchers say allows them to form a better picture of who he was, why these specific items were selected to accompany him on his journey to the underworld and what those discoveries reveal about the dawn of European civilization.

“We have a snapshot here, captured in time, with the objects as they were placed around this guy,” said Davis. “We can look at this not from an outside perspective, but from an insider’s perspective and imagine why and how they chose to place them in the grave.”

Source: Universty of Cincinnati press release.

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If you liked this, see the in-depth feature article published in Popular Archaeology about the initial tomb discovery and artifacts.

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 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

Humans may have occupied Southern Cone of South America 14,000 years ago

Humans may have occupied the Southern Cone 14,000 years ago, according to a study* published September 28, 2016 in the open-access journal PLOS ONE by Gustavo Politis from CONICET and the Universidad Nacional del Centro de la Provincia de Buenos Aires, Argentina and colleagues.

Previous research has suggested that there were people west of the Andes Mountains at around 14,500 years, and that the Clovis people, a prehistoric Native American group of hunter-gatherers, were not the first humans to arrive in the Americas 13,000 years ago. Now, more recent studies from the Pampas region of Argentina support this hypothesis, and suggest that Homo sapiens, or early humans, arrived in the Americas during a period earlier than the Clovis hunters of North America. The authors of the present study sought to date the earliest human occupation of the Arroyo Seco 2, a rich archaeological site in the Southern Cone, the southern tip of South America.

At Arroyo Seco 2, researchers excavated ancient tools, bone remains from a variety of extinct species, and broken animal bones containing fractures caused by human tools. They used radiocarbon dating techniques to determine the age of the mammal bones, and applied microscopic analysis to the specimens.

The researchers found limb bones from extinct mammals at the site, which may indicate human activities of depositing and transporting animal carcasses for consumption at a temporary camp. They found that the bones of some mammal species were concentrated in a specific area of the site, which could indicate specific areas of butchering activities. Microscopic examination also revealed that some bones contained fractures most likely caused by stone tools. Finally, the material remains found at the site were dated between 14,064 and 13,068 years ago, and thus the authors hypothesize that the Arroyo Seco 2 site may have been occupied by humans during that time. This timeline, along with other South American sites, indicates that humans may have arrived at the Southern Cone prior to the Clovis people, but after the onset of the Last Glacial Maximum, or last glacial period which took place 19,000-20,000 years ago.

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pampasluisargerich

 A view in the Pampas region of Argentina, in the Southern Cone of South America. Luis Argerich, Wikimedia Commons 

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While the characteristics of some of these archaeological materials could be explained without human intervention, the combination of evidence strongly suggests human involvement. Humans’ arrival into the Southern Cone 14,000 years ago may represent the last step in the expansion of Homo sapiens throughout the world and the final continental colonization.

Source: A PLOS One press release

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*Politis GG, Gutiérrez MA, Rafuse DJ, Blasi A (2016) The Arrival of Homo sapiens into the Southern Cone at 14,000 Years Ago. PLoS ONE 11(9): e0162870. doi:10.1371/journal.pone.0162870

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Fossil bee nest provides clues to environment of early hominin

Analysis of the first fossil bee nest from the Plio-Pleistocene of South Africa suggests that the human ancestor Australopithecus africanus lived in a dry savannah environment, according to a study* published September 28, 2016 in the open-access journal PLOS ONE by Jennifer Parker from University College London, United Kingdom, and colleagues.

Little paleoecological information is available for the site in South Africa where the first Au. africanus fossil—the ‘Taung Child’—was discovered. However, insect-related fossils, abundant at the discovery site, can yield insights into the paleoenvironment. Bees, for example, tend to build characteristic nests in characteristic conditions. Parker and colleagues analyzed CT scans of a fossil bee nest that was discovered near the Taung Child site to determine its internal structure and thus the kinds of bees that built it.

The fossil nest was exceptionally well preserved, and the structure of its cells and tunnels suggested that it was made by a ground-nesting solitary bee. These bees typically nest on bare, light, dry soil that is exposed to the sun, which bolsters other recent evidence that Au. africanus lived in dry savannahs. Insect-related fossils are common but largely overlooked at sites where human ancestors lived, the researchers said, and their work underscores the contribution such fossils can make to understanding the environments where human ancestors lived.  

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fossilbeenest

 The fossil bee nest. Image credit: Parker, et al (2016) 

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savanna

 Tarangire National Park in Tanzania, East Africa. Today’s African savannahs serve as an analog for the type of environment in which some of our human ancestors lived. Wikimedia Commons

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taungdidierdescouens

 Endocranium face and mandible of a 2.1 million year old Australopithecus africanus specimen, the “Taung Child”, discovered in South Africa. Didier Descouens, Wikimedia Commons

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“When Raymond Dart published his description of the ‘Taung Child’ in 1925 he profoundly changed our understanding of human evolution,” says study co-author Philip Hopley. “In the 90 years following his discovery, attention of anthropologists has moved to other African sites and specimens, and research at Taung has been hampered by the complex geology and uncertain dating. New research at Taung is helping to reconstruct the environment in which this enigmatic little hominin lived and died.”

Source: A PLOS One press release

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*Parker JF, Hopley PJ, Kuhn BF (2016) Fossil Carder Bee’s Nest from the Hominin Locality of Taung, South Africa. PLoS ONE 11(9): e0161198. doi:10.1371/journal.pone.0161198

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Water sources and human colonization of Australia

Researchers report a network of water bodies across Australia that may have fueled rapid human colonization of the continent 47,000 or more years ago. Considerable archaeological debate surrounds the timing and routes of early human dispersal in Australia, and the distribution of water sources on the continent, particularly in the arid interior, might have played a role in facilitating human colonization of the continent. Michael Bird, Damien O’Grady, and Sean Ulm assessed the spatial distribution and permanency of standing water in the modern Australian landscape to investigate human dispersal on the continent. The Australian Water Observations from Space dataset and data on small permanent water bodies enabled the authors to conduct spatial analysis of 112,786 water bodies. The results indicated a high degree of landscape connectivity during wet periods and a high density of water sources stretching from northern Australia, through semi-arid and arid regions, to southeastern Australia and into the continent’s arid center. Moreover, an analysis representing human travel costs between permanent water bodies situated 84% of more than 30,000-year-old archaeological sites within 20 km of modern permanent water sources. The research also shows that multiple, well-watered routes into the arid and semi-arid interior of Australia would have existed during periods of early human occupation and dispersal. The findings suggest that a series of well-watered routes across Australia could have enabled the human occupation of the continent’s arid interior, according to the authors.

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australiasatimage

 Satellite view of Australia. Wikimedia Commons

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

Source: News release of the Proceedings of the National Academy of Sciences

_______________________________________________ 

*“Humans, water, and the colonization of Australia,” by Michael Bird, Damien O’Grady, and Sean Ulm.

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For premium subscribers and those interested in becoming premium subscribers: An anthology of the best feature stories about human evolution as published in Popular Archaeology over the past several years. Richly illustrated, it offers in-depth treatment on some of the most tantalizing discoveries of recent years. It will be updated as new feature articles are published.

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 This richly illustrated issue includes the following stories: Recent findings shedding new light on the whereabouts of the remains of Philip of Macedon, father of Alexander the Great; how an archaeologist-sculptor is bringing bones of the dead back to life; archaeologists uncovering town life at the dawn of civilization; an exclusive interview with internationally acclaimed archaeologist James M. Adovasio about what makes the Meadowcroft Rockshelter prominent in the ongoing search for the first Americans; what archaeologists are finding at the site of the ancient city of Gath, the home town of the biblical Philistine giant, Goliath; and how scientists are redrawing the picture of human evolution in Europe.  Find it on Amazon.com.

 

 

  

 

 

 

 

 

Neanderthal and modern human ear bones

A study* explores morphological differences in and functional properties of the ear bones of Neanderthals and anatomically modern humans (AMH). The ear bones, or ossicles, of the middle ear play an important role in auditory function, and while previous studies have identified structural differences between Neanderthal and AMH ear ossicles, the limited number of Neandertal ossicle samples has hampered detailed comparative studies. Alexander Stoessel and colleagues analyzed the ossicles of 14 Neanderthal individuals to investigate the interplay between function and morphology in Neanderthal and AMH ear ossicles. The authors used micro-CT scans and 3D shape analysis to quantify the shape and functional properties of Neanderthal ossicles and the associated tympanic cavity. Comparative analysis of AMH and Neanderthal ear anatomy revealed differences in shape and spatial configuration that the authors attribute to different evolutionary trajectories related to increases in brain size. Despite contrasting evolutionary paths, however, AMH and Neanderthal ossicle morphological differences did not affect the functional properties of the middle ear. According to the authors, the results might be indicative of consistent aspects of vocal communication in AMH and Neanderthals that were preserved and inherited from a common ancestor.

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neanderthalaquilagib

 Neanderthal skull photo by Aquila Gib, Wikimedia Commons

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Source: News release of the Proceedings of the National Academy of Sciences

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* “Morphology and function of Neandertal and modern human ear ossicles,” Alexander Stoessel et al.

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For premium subscribers and those interested in becoming premium subscribers: An anthology of the best feature stories about human evolution as published in Popular Archaeology over the past several years. Richly illustrated, it offers in-depth treatment on some of the most tantalizing discoveries of recent years. It will be updated as new feature articles are published.

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Ancient Charred Hebrew Scroll Virtually Unwrapped

A new digital analysis of the extremely fragile Ein Gedi scroll — the oldest Pentateuchal scroll in Hebrew outside of the Dead Sea Scrolls — reveals the ink-based writing hidden on its untouchable, disintegrating sheets, without ever opening it. While prior research has successfully identified text within ancient artifacts, the Ein Gedi manuscript represents the first severely damaged, animal skin-based scroll to be virtually unrolled and non-invasively read line by line. The series of digitization techniques employed by William Brent Seales of the University of Kentucky and colleagues demonstrates that it is possible to “see” ink-based text within an extremely fragile scroll while avoiding the need for physical handling. The traditional approach of unrolling a scroll and pressing it flat in order to duplicate text is not an option for splintering manuscripts like the Ein Gedi scroll, which has been burned and crushed into lumps of charcoal. Seales, along with a team of researchers, began by performing a volumetric scan of the scroll using X-ray microtomography, followed by segmentation, which digitally creates a “page” containing the writing. The team pieced together over 100 such scanned segments of the scroll by hand. Further manipulation of the digitized scroll involved using texturing and flattening techniques, and finally, virtual unwrapping to unveil the text written on its pages. At last, the authors were able to “see” the text on five complete wraps of the Ein Gedi scroll, and the resulting image is one of two distinct columns of Hebrew writing that contain legible and countable lines, words, letters, and spacing. Further analysis revealed the scroll’s writings to be the book of Leviticus, which makes it the earliest copy of a Pentateuchal book ever found in a synagogue’s Holy Ark. This virtual unlocking of the Ein Gedi scroll paves the way for further scholarly analysis of this and other text buried in delicate, damaged materials. 

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scroll

 The ancient charred scroll of Ein Gedi. Courtesy Israel Antiquities Authority

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eingedisynagogue

 The excavated synagogue at Ein Gedi

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The Israel Antiquities Authority worked with scientists from Merkel Technologies, Ltd. in Israel, to conduct high resolution 3D scanning of Dead Sea Scrolls fragments and phylactery (tefillin) case using the Bruker Skyscan model 1176 Micro-CT scanner. The fragment of the extensively burned and damaged Ein Gedi scroll was also scanned, after which the scan results were sent to Professor Seales, who had developed a digital imaging software which allowed scientists to virtually “unroll” the scroll and “see” the text. This revealed lines of the first 8 verses of the Book of Leviticus, as follows:

“The LORD summoned Moses and spoke to him from the tent of meeting, saying: Speak to the people of Israel and say to them: When any of you bring an offering of livestock to the LORD, you shall bring your offering from the herd or from the flock. If the offering is a burnt-offering from the herd, you shall offer a male without blemish; you shall bring it to the entrance of the tent of meeting, for acceptance in your behalf before the LORD. You shall lay your hand on the head of the burnt-offering, and it shall be acceptable in your behalf as atonement for you. The bull shall be slaughtered before the LORD; and Aaron’s sons the priests shall offer the blood, dashing the blood against all sides of the altar that is at the entrance of the tent of meeting. The burnt-offering shall be flayed and cut up into its parts. The sons of the priest Aaron shall put fire on the altar and arrange wood on the fire.Aaron’s sons the priests shall arrange the parts, with the head and the suet, on the wood that is on the fire on the altar. (Leviticus 1:1-8).

 

According to Dr. Sefi Porath, discoverer of the scroll in the 1970 Ein Gedi excavations, “The deciphering of the scroll, which was a puzzle for us for 45 years, is very exciting. Ein Gedi was a Jewish village [located near the west coast of the Dead Sea] in the Byzantine period (fourth–seventh century CE) and had a synagogue with an exquisite mosaic floor and a Holy Ark. The settlement was completely burnt to the ground, and none of its inhabitants ever returned to reside there again, or to pick through the ruins in order to salvage valuable property. In the archaeological excavations of the burnt synagogue, we found in addition to the charred scroll fragments, a bronze seven-branched candelabrum (menorah), the community’s money box containing c. 3,500 coins, glass and ceramic oil lamps, and vessels that held perfume. We have no information regarding the cause of the fire, but speculation about the destruction ranges from Bedouin raiders from the region east of the Dead Sea to conflicts with the Byzantine government.” 

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scrollimage

 A composite image of the completed virtual unwrapping of the Ein-Gedi scroll. Credit Seales et al. Sci. Adv. 2016; 2 : e1601247

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The date of the Ein-Gedi scroll is still uncertain. Carbon-14 dating suggests that the scroll was created around 300 CE. However, the ancient script style suggests a date arund 100 CE, according to Ada Yardeni, an authoritative expert on Hebrew paleography. 

In addition to the decipherment of the heavily charred ancient Hebrew scroll, it also confirms the first time a Torah scroll was ever found in a synagogue inside a Holy Ark in an archaeological excavation. 

Sources: Adapted and edited from news releases of the American Association for the Advancement of Science and the Israel Antiquties Authority.

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Ancient mystery solved: They were Neanderthals

Using ancient protein and DNA analysis to uncover a watershed moment in the origin of modern humans, a study* finds support for a Neanderthal provenance of Châtelperronian stone tools and bone artifacts at the Grotte du Renne archeological site in north-central France. Modern humans are thought to have displaced Neanderthals around 50,000-40,000 years ago in Eurasia. To help settle a debate about this major transition in human evolution, Frido Welker and colleagues performed mass spectrometry analysis of specimens found at the archaeological site of the Grotte du Renne in Arcy-sur-cure, France. Some studies suggest that the Châtelperronian stone tools found at the site can be traced back to the Upper Paleolithic and were made by modern humans, whereas others trace the tools to the preceding transitional period marked by the continued presence of Neanderthals, largely based on morphological identification of hominin remains. The authors identified 28 additional hominin bone specimens at Grotte du Renne that likely belonged to a breastfed infant. Through ancient protein analysis, the authors determined that the hominin specimens belonged to Late Pleistocene Neanderthals, not anatomically modern humans. Direct radiocarbon dating of ancient collagen protein extracted from one of the specimens suggested that the specimen likely dated to the Châtelperronian at the site. The findings reaffirm the association of the Châtelperronian tool-kit and bone artifacts at Grotte du Renne with Neanderthals, according to the authors.

Source: PNAS press release.

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*”Palaeoproteomic evidence identifies archaic hominins associated with the Châtelperronian at the Grotte du Renne,” by Frido Welker et al., published in the Proceedings of the National Academy of Sciences.
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