Wednesday, February 8, 2017

Archaeologists find 12th Dead Sea Scrolls cave



Excavations in a cave on the cliffs west of Qumran, near the northwestern shore of the Dead Sea, prove that Dead Sea scrolls from the Second Temple period were hidden in the cave, and were looted by Bedouins in the middle of the last century. With the discovery of this cave, scholars now suggest that it should be numbered as Cave 12.


A piece of parchment to be processed for writing, found rolled up in a jug, in a cave on the cliffs west of Qumran excavated by Hebrew University archaeologists.
CREDIT
(Photo: Casey L. Olson and Oren Gutfeld)

The surprising discovery, representing a milestone in Dead Sea Scroll research, was made by Dr. Oren Gutfeld and Ahiad Ovadia from the Hebrew University of Jerusalem's Institute of Archaeology, with the collaboration of Dr. Randall Price and students from Liberty University in Virginia, USA.

The excavators are the first in over 60 years to discover a new scroll cave and to properly excavate it.

The excavation was supported by the Civil Administration of Judea and Samaria, by the Israel Nature and Parks Authority, and the Israel Antiquities Authority (IAA), and is a part of the new "Operation Scroll" launched at the IAA by its Director-General, Mr. Israel Hasson, to undertake systematic surveys and to excavate the caves in the Judean Desert.

Excavation of the cave revealed that at one time it contained Dead Sea scrolls. Numerous storage jars and lids from the Second Temple period were found hidden in niches along the walls of the cave and deep inside a long tunnel at its rear. The jars were all broken and their contents removed, and the discovery towards the end of the excavation of a pair of iron pickaxe heads from the 1950s (stored within the tunnel for later use) proves the cave was looted.

Until now, it was believed that only 11 caves had contained scrolls. With the discovery of this cave, scholars have now suggested that it would be numbered as Cave 12. Like Cave 8, in which scroll jars but no scrolls were found, this cave will receive the designation Q12 (the Q=Qumran standing in front of the number to indicate no scrolls were found).

"This exciting excavation is the closest we've come to discovering new Dead Sea scrolls in 60 years. Until now, it was accepted that Dead Sea scrolls were found only in 11 caves at Qumran, but now there is no doubt that this is the 12th cave," said Dr. Oren Gutfeld, an archaeologist at the Hebrew University's Institute of Archaeology and director of the excavation. "Finding this additional scroll cave means we can no longer be certain that the original locations (Caves 1 through 11) assigned to the Dead Sea scrolls that reached the market via the Bedouins are accurate."

Dr. Gutfeld added: "Although at the end of the day no scroll was found, and instead we 'only' found a piece of parchment rolled up in a jug that was being processed for writing, the findings indicate beyond any doubt that the cave contained scrolls that were stolen. The findings include the jars in which the scrolls and their covering were hidden, a leather strap for binding the scroll, a cloth that wrapped the scrolls, tendons and pieces of skin connecting fragments, and more."

The finds from the excavation include not only the storage jars, which held the scrolls, but also fragments of scroll wrappings, a string that tied the scrolls, and a piece of worked leather that was a part of a scroll. The finding of pottery and of numerous flint blades, arrowheads, and a decorated stamp seal made of carnelian, a semi-precious stone, also revealed that this cave was used in the Chalcolithic and the Neolithic periods.

This first excavation to take place in the northern part of the Judean Desert as part of "Operation Scroll" will open the door to further understanding the function of the caves with respect to the scrolls, with the potential of finding new scroll material. The material, when published, will provide important new evidence for scholars of the archaeology of Qumran and the Dead Sea caves.

"The important discovery of another scroll cave attests to the fact that a lot of work remains to be done in the Judean Desert and finds of huge importance are still waiting to be discovered," said Israel Hasson, Director-General of the Israel Antiquities Authority. "We are in a race against time as antiquities thieves steal heritage assets worldwide for financial gain. The State of Israel needs to mobilize and allocate the necessary resources in order to launch a historic operation, together with the public, to carry out a systematic excavation of all the caves of the Judean Desert."


Thursday, February 2, 2017

Baltic hunter-gatherers began farming without influence of migration, ancient DNA suggests


New research indicates that Baltic hunter-gatherers were not swamped by migrations of early agriculturalists from the Middle East, as was the case for the rest of central and western Europe. Instead, these people probably acquired knowledge of farming and ceramics by sharing cultures and ideas -- rather than genes -- with outside communities.

Scientists extracted ancient DNA from a number of archaeological remains discovered in Latvia and the Ukraine, which were between 5,000 and 8,000 years old. These samples spanned the Neolithic period, which was the dawn of agriculture in Europe, when people moved from a mobile hunter-gatherer lifestyle to a settled way of life based on food production.

We know through previous research that large numbers of early farmers from the Levant (the Near East) - driven by the success of their technological innovations such as crops and pottery - had expanded to the peripheral parts of Europe by the end of the Neolithic and largely replaced hunter-gatherer populations.

However, the new study, published today in the journal Current Biology, shows that the Levantine farmers did not contribute to hunter-gatherers in the Baltic as they did in Central and Western Europe.

The research team, which includes scientists from Trinity College Dublin, the University of Cambridge, and University College Dublin, says their findings instead suggest that the Baltic hunter-gatherers learned these skills through communication and cultural exchange with outsiders.

The findings feed into debates around the 'Neolithic package,' -- the cluster of technologies such as domesticated livestock, cultivated cereals and ceramics, which revolutionised human existence across Europe during the late Stone Age.

Advances in ancient DNA work have revealed that this 'package' was spread through Central and Western Europe by migration and interbreeding: the Levant and later Anatolian farmers mixing with and essentially replacing the hunter-gatherers.

But the new work suggests migration was not a 'universal driver' across Europe for this way of life. In the Baltic region, archaeology shows that the technologies of the 'package' did develop -- albeit less rapidly - even though the analyses show that the genetics of these populations remained the same as those of the hunter-gatherers throughout the Neolithic.

Andrea Manica, one of the study's senior authors from the University of Cambridge, said: "Almost all ancient DNA research up to now has suggested that technologies such as agriculture spread through people migrating and settling in new areas."

"However, in the Baltic, we find a very different picture, as there are no genetic traces of the farmers from the Levant and Anatolia who transmitted agriculture across the rest of Europe."

"The findings suggest that indigenous hunter-gatherers adopted Neolithic ways of life through trade and contact, rather than being settled by external communities. Migrations are not the only model for technology acquisition in European prehistory."

While the sequenced genomes showed no trace of the Levant farmer influence, one of the Latvian samples did reveal genetic influence from a different external source -- one that the scientists say could be a migration from the Pontic Steppe in the east. The timing (5-7,000 years ago) fits with previous research estimating the earliest Slavic languages.

Researcher Eppie Jones, from Trinity College Dublin and the University of Cambridge, was the lead author of the study. She said: "There are two major theories on the spread of Indo-European languages, the most widely spoken language family in the world. One is that they came from the Anatolia with the agriculturalists; another that they developed in the Steppes and spread at the start of the Bronze Age."

"That we see no farmer-related genetic input, yet we do find this Steppe-related component, suggests that at least the Balto-Slavic branch of the Indo-European language family originated in the Steppe grasslands of the East, which would bring later migrations of Bronze Age horse riders."

The researchers point out that the time scales seen in Baltic archaeology are also very distinct to the rest of Europe, with a much more drawn-out and piecemeal uptake of Neolithic technologies, rather than the complete 'package' that arrives with migrations to take most of Europe by storm.

Andrea Manica added: "Our evidence of genetic continuity in the Baltic, coupled with the archaeological record showing a prolonged adoption of Neolithic technologies, would suggest the existence of trade networks with farming communities largely independent of interbreeding."

"It seems the hunter-gatherers of the Baltic likely acquired bits of the Neolithic package slowly over time through a 'cultural diffusion' of communication and trade, as there is no sign of the migratory wave that brought farming to the rest of Europe during this time.

"The Baltic hunter-gatherer genome remains remarkably untouched until the great migrations of the Bronze Age sweep in from the East."

About the study

The researchers analysed eight ancient genomes - six from Latvia and two from Ukraine - that spanned a timeframe of three and a half thousand years (between 8,300 and 4,800 years ago). This enabled them to start plotting the genetic history of Baltic inhabitants during the Neolithic.

DNA was extracted from the petrous area of skulls that had been recovered by archaeologists from some of the region's richest Stone Age cemeteries. The petrous, at the base of the skull, is one of the densest bones in the body, and a prime location for DNA that has suffered the least contamination over millennia.


Wednesday, February 1, 2017

Ancient DNA reveals 'continuity' between Stone Age and modern populations in East Asia


Researchers working on ancient DNA extracted from human remains interred almost 8,000 years ago in a cave in the Russian Far East have found that the genetic makeup of certain modern East Asian populations closely resemble that of their hunter-gatherer ancestors.

The study, published today in the journal Science Advances, is the first to obtain nuclear genome data from ancient mainland East Asia and compare the results to modern populations.

The findings indicate that there was no major migratory interruption, or "population turnover", for well over seven millennia. Consequently, some contemporary ethnic groups share a remarkable genetic similarity to Stone Age hunters that once roamed the same region.

The high "genetic continuity" in East Asia is in stark contrast to most of Western Europe, where sustained migrations of early farmers from the Levant overwhelmed hunter-gatherer populations. This was followed by a wave of horse riders from Central Asia during the Bronze Age. These events were likely driven by the success of emerging technologies such as agriculture and metallurgy

The new research shows that, at least for part of East Asia, the story differs - with little genetic disruption in populations since the early Neolithic period.

Despite being separated by a vast expanse of history, this has allowed an exceptional genetic proximity between the Ulchi people of the Amur Basin, near where Russia borders China and North Korea, and the ancient hunter-gatherers laid to rest in a cave close to the Ulchi's native land.

The researchers suggest that the sheer scale of East Asia and dramatic variations in its climate may have prevented the sweeping influence of Neolithic agriculture and the accompanying migrations that replaced hunter-gatherers across much of Europe. They note that the Ulchi retained their hunter-fisher-gatherer lifestyle until recent times.

"Genetically speaking, the populations across northern East Asia have changed very little for around eight millennia," said senior author Andrea Manica from the University of Cambridge, who conducted the work with an international team, including colleagues from Ulsan National Institute of Science and Technology in Korea, and Trinity College Dublin and University College Dublin in Ireland.

"Once we accounted for some local intermingling, the Ulchi and the ancient hunter-gatherers appeared to be almost the same population from a genetic point of view, even though there are thousands of years between them."

The new study also provides further support for the 'dual origin' theory of modern Japanese populations: that they descend from a combination of hunter-gatherers and agriculturalists that eventually brought wet rice farming from southern China. A similar pattern is also found in neighbouring Koreans, who are genetically very close to Japanese.

However, Manica says that much more DNA data from Neolithic China is required to pinpoint the origin of the agriculturalists involved in this mixture.

The team from Trinity College Dublin were responsible for extracting DNA from the remains, which were found in a cave known as Devil's Gate. Situated in a mountainous area close to the far eastern coast of Russia that faces northern Japan, the cave was first excavated by a soviet team in 1973.

Along with hundreds of stone and bone tools, the carbonised wood of a former dwelling, and woven wild grass that is one of the earliest examples of a textile, were the incomplete bodies of five humans.

If ancient DNA can be found in sufficiently preserved remains, sequencing it involves sifting through the contamination of millennia. The best samples for analysis from Devil's Gate were obtained from the skulls of two females: one in her early twenties, the other close to fifty. The site itself dates back over 9,000 years, but the two women are estimated to have died around 7,700 years ago.

Researchers were able to glean the most from the middle-aged woman. Her DNA revealed she likely had brown eyes and thick, straight hair. She almost certainly lacked the ability to tolerate lactose, but was unlikely to have suffered from 'alcohol flush': the skin reaction to alcohol now common across East Asia.

While the Devil's Gate samples show high genetic affinity to the Ulchi, fishermen from the same area who speak the Tungusic language, they are also close to other Tungusic-speaking populations in present day China, such as the Oroqen and Hezhen.

"These are ethnic groups with traditional societies and deep roots across eastern Russia and China, whose culture, language and populations are rapidly dwindling," added lead author Veronika Siska, also from Cambridge.

"Our work suggests that these groups form a strong genetic lineage descending directly from the early Neolithic hunter-gatherers who inhabited the same region thousands of years previously."

Climate change drove population decline in New World before Europeans arrived


What caused the rapid disappearance of a vibrant Native American agrarian culture that lived in urban settlements from the Ohio River Valley to the Mississippi River Valley in the two centuries preceding the European settlement of North America? In a new study, researchers from Indiana University-Purdue University Indianapolis reconstructed and analyzed 2,100 years of temperature and precipitation data -- and point the finger at climate change.

Employing proxies of prehistoric temperature and precipitation preserved in finely layered lake sediments, somewhat analogous to tree-ring records used to reconstruct drought and temperature, the IUPUI scientists have reported on the dramatic environmental changes that occurred as the Native Americans -- known as Mississippians -- flourished and then vanished from the Midwestern United States. The researchers theorize that the catastrophic climate change they observed, which doomed food production, was a primary cause of the disappearance.

"Abrupt climate change can impose conditions like drought. If these conditions are severe and sustained, as we have determined that they became for the Mississippians, it is virtually impossible for societies, especially those based on agriculture, to survive," said paleoclimatologist Broxton Bird, corresponding author of the new study. "From the lake records, we saw that the abundant rainfall and consistent good weather -- which supported Mississippian society as it grew -- changed, making agriculture unsustainable." Bird is an assistant professor of earth sciences in the School of Science at IUPUI.

This failure of their principal food source likely destabilized the sociopolitical system that supported Mississippian society, according to archeologist Jeremy Wilson, a study co-author. He is an associate professor of anthropology in the School of Liberal Arts at IUPUI.

"Archeologists have recognized that from 1300 onward, Mississippian villages started disappearing -- one after the other -- almost like lightbulbs in a string, but the question has always been 'why?,'" said Wilson. "Dr. Bird and his students have shown from the lake-sediment evidence that during the period known as the Little Ice Age, from 1300 to 1800, there was a profound change in climate to colder and drier conditions, which would have negatively impacted the growing of maize in and around Mississippian villages.

"It's important for us to understand how past civilizations coped with climate change as we encounter things like changing precipitation patterns and temperatures that appear to be rising around the world today."

As the Mississippians' culture waned, the IUPUI researchers found, there were lower temperatures and significantly less summer rainfall than during its rise. They attribute these changes to more El Niño-like conditions in the Pacific Ocean and cooling during the Little Ice Age, which altered atmospheric circulation such that moisture delivered to the Midwest was derived from the northwestern U.S. (Pacific and Arctic) instead of the Gulf of Mexico, as was the case during the Mississippians' rise. The longer transport distance of Pacific air masses during the Little Ice Age left less moisture available for rainfall in the Midwest, resulting in drought conditions that undermined agricultural production.

"Climate change had been previously postulated as one of the factors responsible for the disappearance of the Mississippians," Bird said. "What our research did was develop the highest-resolution record yet produced of rainfall in the midcontinental U.S. for the last 2,100 years, including the time frame from the beginning of the Mississippian period -- about 1,000 years ago -- to 500 years ago, when much of the lower Midwest was totally abandoned by these people. Our results strongly support climate change -- drought, specifically -- as a significant cause of the disappearance of Mississippians from the midcontinent through its impact on their ability to farm and produce food surpluses.

"Mississippians did not have irrigation and relied on rainfall to grow their crops. Modern agriculture in the Midwest corn belt likewise relies on rainfall with very little irrigation infrastructure, making us similarly vulnerable to drought," Bird said.

"Midcontinental Native American Population Dynamics and Late Holocene Hydroclimate Extremes" is published in Scientific Reports, an open access, peer-reviewed Nature research journal.
The sediment studied was from Martin Lake in northeast Indiana. Bird and Wilson are continuing their research at additional lakes, especially those adjacent to archeological sites, throughout the midcontinent.


Friday, January 27, 2017

Anthropologists uncover art by (really) old masters -- 38,000 year-old engravings



An international team of anthropologists has uncovered a 38,000-year-old engraved image, above, in a southwestern French rockshelter -- a finding that marks some of the earliest known graphic imagery found in Western Eurasia and offers insights into the nature of modern humans during this period. The limestone slab engraved with image of an aurochs, or extinct wild cow, was discovered at Abri Blanchard in 2012.

CREDIT
Musée national de Préhistoire collections - photo MNP - Ph. Jugie
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IMAGE: AN INTERNATIONAL TEAM OF ANTHROPOLOGISTS HAS UNCOVERED A 38,000-YEAR-OLD ENGRAVED IMAGE, ABOVE, IN A SOUTHWESTERN FRENCH ROCKSHELTER -- A FINDING THAT MARKS SOME OF THE EARLIEST KNOWN GRAPHIC IMAGERY FOUND... view more

CREDIT: MUSÉE NATIONAL DE PRÉHISTOIRE COLLECTIONS - PHOTO MNP - PH. JUGIE

An international team of anthropologists has uncovered a 38,000-year-old engraved image in a southwestern French rockshelter--a finding that marks some of the earliest known graphic imagery found in Western Eurasia and offers insights into the nature of modern humans during this period.

"The discovery sheds new light on regional patterning of art and ornamentation across Europe at a time when the first modern humans to enter Europe dispersed westward and northward across the continent," explains NYU anthropologist Randall White, who led the excavation in France's Vézère Valley.

The findings, which appear in the journal Quaternary International, center on the early modern humans' Aurignacian culture, which existed from approximately 43,000 to 33,000 years ago.

Abri Blanchard, the French site of the recently uncovered engraving, a slab bearing a complex image of an aurochs, or wild cow, surrounded by rows of dots, was previously excavated in the early 20th century. White and his team members began their methodical exploration of remaining deposits at the site in 2011, with the discovery occurring in 2012.

White contends that Aurignacian art offers a window into the lives and minds of its makers--and into the societies they created.

"Following their arrival from Africa, groups of modern humans settled into western and Central Europe, showing a broad commonality in graphic expression against which more regionalized characteristics stand out," he explains. "This pattern fits well with social geography models that see art and personal ornamentation as markers of social identity at regional, group, and individual levels."

Abri Blanchard and its sister site, Abri Castanet, previously excavated by White's team, have long been recognized as being among the oldest sites in Eurasia bearing artifacts of human symbolism. Over time, hundreds of personal ornaments have been discovered, including pierced animal teeth, pierced shells, ivory and soapstone beads, engravings, and paintings on limestone slabs.


Thursday, January 26, 2017

Advanced geometry no secret to prehistoric architects in US Southwest


This is a satellite photo of Pueblo Bonito archaeological site with illustrations demonstrating its geometrical properties.
Credit: Dr. Sherry Towers

 
Imagine you are about to plan and construct a building that involves several complicated geometrical shapes, but you aren't allowed to write down any numbers or notes as you do it. For most of us, this would be impossible.

Yet, new research from Arizona State University has revealed that the ancient Southwestern Pueblo people, who had no written language or written number system, were able to do just that -- and used these skills to build sophisticated architectural complexes.

Dr. Sherry Towers, a professor with the ASU Simon A. Levin Mathematical, Computational and Modeling Sciences Center, uncovered these findings while spending several years studying the Sun Temple archaeological site in Mesa Verde National Park in Colorado, constructed around A.D. 1200.

"The site is known to have been an important focus of ceremony in the region for the ancestral Pueblo peoples, including solstice observations," Towers says. "My original interest in the site involved looking at whether it was used for observing stars as well."

However, as Towers delved deeper into the site's layout and architecture, interesting patterns began to emerge.

"I noticed in my site survey that the same measurements kept popping up over and over again," she says. "When I saw that the layout of the site's key features also involved many geometrical shapes, I decided to take a closer look."

The geometrical shapes used within this location would be familiar to any high school student: equilateral triangles, squares, 45-degree right triangles, Pythagorean triangles, and the "Golden rectangle," which was well known to architects in ancient Greece and Egypt and is often used in Western art due to its pleasing proportions.

With some geometrical know-how, a straight-edge, a compass or cord, and a unit of measurement, all of the shapes are fairly easy to construct. But, unlike the ancient Greeks, Egyptians and Maya, the ancestral Pueblo people had no written language or number system to aid them when they built the site. Incredibly, their measurements were still near-perfect, with a relative error of less than one percent.

"This is what I find especially amazing," Towers says. "The genius of the site's architects cannot be underestimated. If you asked someone today to try to reconstruct this site and achieve the same precision that they had using just a stick and a piece of cord, it's highly unlikely they'd be able to do it, especially if they couldn't write anything down as they were working."

During her research, Towers discovered that the site was laid out using a common unit of measurement just over 30 centimeters in length -- equal to about one modern-day foot. She also found evidence that some of the same geometrical constructs from Sun Temple were used in at least one other ancestral Puebloan ceremonial site, Pueblo Bonito, located in New Mexico's Chaco Culture National Historic Park.

"Further study is needed to see if that site also has the same common unit of measurement," she says. "It's a task that will keep us busy for some years to come."

Tuesday, January 24, 2017

Archaeologists uncover new clues to Maya collapse



Using the largest set of radiocarbon dates ever obtained from a single Maya site, archaeologists have developed a high-precision chronology that sheds new light on patterns leading up to the two major collapses of the ancient civilization.

Archaeologists have long puzzled over what caused what is known as the Classic Maya collapse in the ninth century A.D., when many of the ancient civilization's cities were abandoned. More recent investigations have revealed that the Maya also experienced an earlier collapse in the second century A.D. -- now called the Preclassic collapse -- that is even more poorly understood.

University of Arizona archaeologist Takeshi Inomata and his colleagues suggest in a new paper, to be published in the Proceedings of the National Academy of Sciences, that both collapses followed similar trajectories, with multiple waves of social instability, warfare and political crises leading to the rapid fall of many city centers.

The findings are based on a highly refined chronology developed by Inomata and his colleagues using an unprecedented 154 radiocarbon dates from the archaeological site of Ceibal in Guatemala, where the team has worked for over a decade.

While more general chronologies might suggest that the Maya collapses occurred gradually, this new, more precise chronology indicates more complex patterns of political crises and recoveries leading up to each collapse.

"What we found out is that those two cases of collapse (Classic and Preclassic) follow similar patterns," said Inomata, the paper's lead author and a professor in the School of Anthropology in the UA College of Social and Behavioral Sciences. "It's not just a simple collapse, but there are waves of collapse. First, there are smaller waves, tied to warfare and some political instability, then comes the major collapse, in which many centers got abandoned. Then there was some recovery in some places, then another collapse."

Using radiocarbon dating and data from ceramics and highly controlled archaeological excavations, the researchers were able to establish the refined chronology of when population sizes and building construction increased and decreased at Ceibal.

While the findings may not solve the mystery of why exactly the Maya collapses occurred, they are an important step toward better understanding how they unfolded.

"It's really, really interesting that these collapses both look very similar, at very different time periods," said Melissa Burham, one of three UA anthropology graduate students who co-authored the paper. "We now have a good understanding of what the process looked like, that potentially can serve as a template for other people to try to see if they have a similar pattern at their (archaeological) sites in the same area."

Inomata and his UA colleagues -- anthropology professor Daniela Triadan and students Burham, Jessica MacLellan and Juan Manuel Palomo -- worked with collaborators at Ibaraki University, Naruto University of Education and the Graduate University for Advanced Studies in Japan, and with Guatemalan archaeologists and students.

Radiocarbon dating was done at Paleo Laboratory Company in Japan and at the Accelerator Mass Spectrometry Laboratory in the UA Department of Physics.

"Radiocarbon dating has been used for a long time, but now we're getting to an interesting period because it's getting more and more precise," said Inomata, who also is an Agnese Nelms Haury Chair in Environment and Social Justice at the UA. "We're getting to the point where we can get to the interesting social patterns because the chronology is refined enough, and the dating is precise enough."