New snake discovery rewrites history, points to North America's role in snake evolution

A new species of fossil snake unearthed in Wyoming is rewriting our understanding of snake evolution. The discovery, based on four remarkably well-preserved specimens found curled together in a burrow, reveals a new species named Hibernophis breithaupti. This snake lived in North America 34 million years ago and sheds light on the origin and diversification of boas and pythons.

Hibernophis breithaupti has unique anatomical features, in part because the specimens are articulated -- meaning they were found all in one piece with the bones still arranged in the proper order -- which is unusual for fossil snakes.

Researchers believe it may be an early member of Booidea, a group that includes modern boas and pythons.

Modern boas are widespread in the Americas, but their early evolution is not well understood.These new and very complete fossils add important new information, in particular, on the evolution of small, burrowing boas known as rubber boas.

Traditionally, there has been much debate on the evolution of small burrowing boas.

Hibernophis breithaupti shows that northern and more central parts of North America might have been a key hub for their development.

The discovery of these snakes curled together also hints at the oldest potential evidence for a behavior familiar to us today -- hibernation in groups.

"Modern garter snakes are famous for gathering by the thousands to hibernate together in dens and burrows," says Michael Caldwell, a U of A paleontologist who co-led the research along with his former graduate student Jasmine Croghan, and collaborators from Australia and Brazil. "They do this to conserve heat through the effect created by the ball of hibernating animals. It's fascinating to see possible evidence of such social behavior or hibernation dating back 34 million years."

From Science Daily

Beautiful nebula, violent history: Clash of stars solves stellar mystery

When astronomers looked at a stellar pair at the heart of a stunning cloud of gas and dust, they were in for a surprise. Star pairs are typically very similar, like twins, but in HD 148937, one star appears younger and, unlike the other, is magnetic. New data from the European Southern Observatory (ESO) suggest there were originally three stars in the system, until two of them clashed and merged. This violent event created the surrounding cloud and forever altered the system's fate.

"When doing background reading, I was struck by how special this system seemed," says Abigail Frost, an astronomer at ESO in Chile and lead author of the study published today in Science. The system, HD 148937, is located about 3800 light-years away from Earth in the direction of the Norma constellation.

It is made up of two stars much more massive than the Sun and surrounded by a beautiful nebula, a cloud of gas and dust.

"A nebula surrounding two massive stars is a rarity, and it really made us feel like something cool had to have happened in this system. When looking at the data, the coolness only increased."

"After a detailed analysis, we could determine that the more massive star appears much younger than its companion, which doesn't make any sense since they should have formed at the same time!" Frost says.

The age difference -- one star appears to be at least 1.5 million years younger than the other -- suggests something must have rejuvenated the more massive star.

Another piece of the puzzle is the nebula surrounding the stars, known as NGC 6164/6165.

It is 7500 years old, hundreds of times younger than both stars.

The nebula also shows very high amounts of nitrogen, carbon and oxygen.

This is surprising as these elements are normally expected deep inside a star, not outside; it is as if some violent event had set them free.

To unravel the mystery, the team assembled nine years' worth of data from the PIONIER and GRAVITY instruments, both on ESO's Very Large Telescope Interferometer (VLTI), located in Chile's Atacama Desert.

They also used archival data from the FEROS instrument at ESO's La Silla Observatory.

"We think this system had at least three stars originally; two of them had to be close together at one point in the orbit whilst another star was much more distant," explains Hugues Sana, a professor at KU Leuven in Belgium and the principal investigator of the observations.

"The two inner stars merged in a violent manner, creating a magnetic star and throwing out some material, which created the nebula. The more distant star formed a new orbit with the newly merged, now-magnetic star, creating the binary we see today at the centre of the nebula."

"The merger scenario was already in my head back in 2017 when I studied nebula observations obtained with the European Space Agency's Herschel Space Telescope," adds co-author Laurent Mahy, currently a senior researcher at the Royal Observatory of Belgium.

"Finding an age discrepancy between the stars suggests that this scenario is the most plausible one and it was only possible to show it with the new ESO data."

This scenario also explains why one of the stars in the system is magnetic and the other is not -- another peculiar feature of HD 148937 spotted in the VLTI data.

At the same time, it helps solve a long-standing mystery in astronomy: how massive stars get their magnetic fields.

While magnetic fields are a common feature of low-mass stars like our Sun, more massive stars cannot sustain magnetic fields in the same way.

Yet some massive stars are indeed magnetic.

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Ice cores provide first documentation of rapid Antarctic ice loss in the past

Researchers from the University of Cambridge and the British Antarctic Survey have uncovered the first direct evidence that the West Antarctic Ice Sheet shrunk suddenly and dramatically at the end of the Last Ice Age, around eight thousand years ago.

The evidence, contained within an ice core, shows that in one location the ice sheet thinned by 450 metres -- that's more than the height of the Empire State Building -- in just under 200 years.

This is the first evidence anywhere in Antarctica for such a fast loss of ice. Scientists are worried that today's rising temperatures might destabilize parts of the West Antarctic Ice Sheet in the future, potentially passing a tipping point and inducing a runaway collapse. The new study, published in Nature Geoscience, sheds light on how quickly Antarctic ice could melt if temperatures continue to soar.

"We now have direct evidence that this ice sheet suffered rapid ice loss in the past," said Professor Eric Wolff, senior author of the new study from Cambridge's Department of Earth Sciences. "This scenario isn't something that exists only in our model predictions and it could happen again if parts of this ice sheet becomes unstable."

The Antarctic ice sheets, from west to east, contain enough freshwater to raise global sea levels by around 57 metres. The West Antarctic Ice Sheet is considered particularly vulnerable because much of it sits on bedrock that lies below sea level.

Model predictions suggest that a large part of the West Antarctic Ice Sheet could disappear in the next few centuries, causing sea levels to rise. Exactly when and how quickly the ice could be lost is, however, uncertain.

One way to train ice sheet models to make better predictions is to feed them with data on ice loss from periods of warming in Earth's history. At the peak of Last Ice Age 20,000 years ago, Antarctic ice covered a larger area than today. As our planet thawed and temperatures slowly climbed, the West Antarctic Ice Sheet contracted to more or less its current extent.

"We wanted to know what happened to the West Antarctic Ice Sheet at the end of the Last Ice Age, when temperatures on Earth were rising, albeit at a slower rate than current anthropogenic warming," said Dr Isobel Rowell, study co-author from the British Antarctic Survey. "Using ice cores we can go back to that time and estimate the ice sheet's thickness and extent."

Ice cores are made up of layers of ice that formed as snow fell and was then buried and compacted into ice crystals over thousands of years. Trapped within each ice layer are bubbles of ancient air and contaminants that mixed with each year's snowfall -- providing clues as to the changing climate and ice extent.

The researchers drilled a 651-metre-long ice core from Skytrain Ice Rise in 2019. This mound of ice sits at the edge of the ice sheet, near the point where grounded ice flows into the floating Ronne Ice Shelf.

After transporting the ice cores back to Cambridge at -20oC, the researchers analysed them to reconstruct the ice thickness. First, they measured stable water isotopes, which indicate the temperature at the time the snow fell. Temperature decreases at higher altitudes (think of cold mountain air), so they were able to equate warmer temperatures with lower-lying, thinner ice.

They also measured the pressure of air bubbles trapped in the ice. Like temperature, air pressure also varies systematically with elevation. Lower-lying, thinner ice contains higher pressure air bubbles.

These measurements told them that ice thinned rapidly 8,000 years ago. "Once the ice thinned, it shrunk really fast," said Wolff, "this was clearly a tipping point -- a runaway process."

They think this thinning was probably triggered by warm water getting underneath the edge of the West Antarctic Ice Sheet, which normally sits on bedrock. This likely untethered a section of the ice from bedrock, allowing it to float suddenly and forming what is now the Ronne Ice Shelf. This then allowed neighbouring Skytrain Ice Rise, no longer restrained by grounded ice, to thin rapidly.

The researchers also found that the sodium content of the ice (originating from salt in sea spray) increased about 300 years after the ice thinned. This told them that, after the ice thinned, the ice shelf shrunk back so that the sea was hundreds of kilometres nearer to their site.

"We already knew from models that the ice thinned at around this time, but the date of this was uncertain," said Rowell. Ice sheet models placed the retreat anywhere between 12,000 and 5,000 years ago and couldn't say how quickly it happened. "We now have a very precisely dated observation of that retreat which can be built into improved models," said Rowell.

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Neanderthals and humans lived side by side in Northern Europe 45,000 years ago

A genetic analysis of bone fragments unearthed at an archaeological site in central Germany shows conclusively that modern humans -- Homo sapiens -- had already reached Northern Europe 45,000 years ago, overlapping with Neanderthals for several thousand years before the latter went extinct.

The findings establish that the site near Ranis, Germany, which is known for its finely flaked, leaf-shaped stone tool blades, is among the oldest confirmed sites of modern human Stone Age culture in north central and northwestern Europe.

The evidence that Homo sapiens and Homo neanderthalensis lived side by side is consistent with genomic evidence that the two species occasionally interbred. It also feeds the suspicion that the invasion of Europe and Asia by modern humans some 50,000 years ago helped drive Neanderthals, which had occupied the area for more than 500,000 years, to extinction.

The genetic analysis, along with an archaeological and isotopic analysis and radiocarbon dating of the Ranis site, are detailed in a trio of papers appearing today in the journals Nature and Nature Ecology and Evolution.

The stone blades at Ranis, referred to as leaf points, are similar to stone tools found at several sites in Moravia, Poland, Germany and the United Kingdom. These tools that are thought to have been produced by the same culture, referred to as the Lincombian-Ranisian-Jerzmanowician (LRJ) culture or technocomplex. Because of previous dating, the Ranis site was known to be 40,000 years old or older, but without recognizable bones to indicate who made the tools, it was unclear whether they were the product of Neanderthals or Homo sapiens.

The new findings demonstrate that "Homo sapiens made this technology, and that Homo sapiens were this far north at this time period, which is 45,000 years ago," said Elena Zavala, one of four first authors of the Nature paper and a Miller Research Fellow at the University of California, Berkeley. "So these are among the earliest Homo sapiens in Europe."

Zavala was a Ph.D. student at the Max Planck Institute for Evolutionary Anthropology (MPI-EVA) in Leipzig in 2018 when she first began working on the project, which was a major effort spearheaded by Jean-Jacque Hublin, former director of the institute and a professor at the Collège de France in Paris.

"The Ranis cave site provides evidence for the first dispersal of Homo sapiens across the higher latitudes of Europe. It turns out that stone artifacts that were thought to be produced by Neanderthals were, in fact, part of the early Homo sapiens toolkit," Hublin said. "This fundamentally changes our previous knowledge about the period: Homo sapiens reached northwestern Europe long before Neanderthal disappearance in southwestern Europe."

Bones from maternal relatives?

Zavala conducted the genetic analysis of hominid bone fragments from the new and deeper excavations at Ranis between 2016 and 2022 and from earlier excavations in the 1930s. Because the DNA in ancient bones is highly fragmented, she employed special techniques to isolate and sequence the DNA, all of it mitochondrial DNA (mtDNA) that is inherited solely from the mother.

"We confirmed that the skeletal fragments belonged to Homo sapiens. Interestingly, several fragments shared the same mitochondrial DNA sequences -- even fragments from different excavations," she said. "This indicates that the fragments belonged to the same individual or their maternal relatives, linking these new finds with the ones from decades ago."

The bone fragments were initially identified as human through analysis of bone proteins -- a field called paleoproteomics -- by another first author, Dorothea Mylopotamitaki, a doctoral student at the Collège de France and fomerly of MPI-EVA.

By comparing the Ranis mitochondrial DNA sequences with mtDNA sequences obtained from human remains at other paleolithic sites in Europe, Zavala was able to construct a family tree of early Homo sapiens across Europe. All but one of the 13 Ranis fragments were quite similar to one another and, surprisingly, resembled mtDNA from the 43,000-year-old skull of a woman discovered in a cave at Zlatý k?? in the Czech Republic. The lone standout grouped with an individual from Italy.

"That raises some questions: Was this a single population? What could be the relationship here?" Zavala said. "But with mitochondrial DNA, that's only one side of the history. It's only the maternal side. We would need to have nuclear DNA to be able to start looking into this."

A transitional site between Middle and Upper Paleolithic

Zavala specializes in the analysis of DNA found in long-buried bones, on bone tools and in sediment. Her search through sediment from various levels of the Ranis excavation turned up DNA from a broad array of mammals, but none from hominids. The analysis, combined with morphological, isotopic and proteomic analysis of bone fragments, paints a picture of the environment at that time and of the diet of both humans and animals that occupied the cave over the millennia.

The presence of reindeer, cave bear, woolly rhinoceros and horse bones, for example, indicated cold climatic conditions typical of steppe tundra and similar to conditions in Siberia and northern Scandinavia today, and a human diet based on large terrestrial animals. The researchers concluded that the cave was used primarily by hibernating cave bears and denning hyenas, with only periodic human presence.

"This lower-density archaeological signature matches other Lincombian-Ranisian-Jerzmanowician sites and is best explained by expedient visits of short duration by small, mobile groups of pioneer H. sapiens," according to one of the papers published in Nature Ecology and Evolution.

"This shows that even these earlier groups of Homo sapiens dispersing across Eurasia already had some capacity to adapt to such harsh climatic conditions," said Sarah Pederzani, a postdoctoral fellow at the University of La Laguna in Spain, who led the paleoclimate study of the site. "Until recently, it was thought that resilience to cold-climate conditions did not appear until several thousand years later, so this is a fascinating and surprising result."

The Ranis site, called Ilsenhöhle and located at the base of a castle, was initially excavated mainly between 1932 and 1938. The leaf points found there were eventually assigned to the final years of the Middle Paleolithic period -- between about 300,000 and 30,000 years ago -- or the beginning of the Upper Paleolithic, which begins around 50,000 years ago.

Because of the importance of the Ranis site for understanding the LRJ technocomplex and the transition from the Neanderthal-associated late Middle Paleolithic to the modern human Upper Paleolithic in central Europe, Hublin and his team decided to reexcavate the site using modern tools of archaeology.

The new excavations extended to bedrock, about 8 meters below the surface, and involved removing a rock -- likely fallen from the cave ceiling -- that had halted the previous excavation. Here, Hublin's team uncovered chips from flint tools and a quartzite flake consistent with the LRJ technocomplex. Subsequent proteomic analysis of thousands of recovered bone chips confirmed that four were from hominids. Of bone chips uncovered during the 1930s excavations, nine were from hominids.

Zavala's DNA analysis confirmed that all 13 bone fragments came from Homo sapiens.

A revised settlement history of Northern Europe

The team also carried out radiocarbon dating of human and animal bones from different layers of the site to reconstruct the site's chronology, focusing on bones with traces of human modifications on their surfaces, which links their dates to human presence in the cave.

"We found very good agreement between the radiocarbon dates from the Homo sapiens bones from both excavation collections and with modified animal bones from the LRJ layers of the new excavation, making a very strong link between the human remains and LRJ. The evidence suggests that Homo sapiens were sporadically occupying the site from as early as 47,500 years ago," said another first author, Helen Fewlass, a former Max Planck researcher who is now a European Molecular Biology Organization (EMBO) Postdoctoral Fellow at the Francis Crick Institute in London.

"The results from the Ilsenhöhle in Ranis fundamentally changed our ideas about the chronology and settlement history of Europe north of the Alps," added Tim Schüler of the Thuringian State Office for the Preservation of Historical Monuments and Archaeology in Weimar, Germany.

Read more at Science Daily

Ancient cities provide key datasets for urban planning, policy and predictions in the Anthropocene

A new study led by authors from the Max Planck Institute of Geoanthropology, published in the first edition of the new journal Nature Cities, shows how state-of-the-art methods and perspectives from archaeology, history, and palaeoecology are shedding new light on 5,500 years of urban life.

Cities play a key role in climate change and biodiversity and are one of the most recognizable features of the Anthropocene.

They also accelerate innovation and shape social networks, while perpetuating and intensifying inequalities.

Today over half of all humanity lives in cities, a threshold which will rise to nearly 70% by the mid-21st century.

Yet despite their importance for the Anthropocene, cities are not a recent phenomenon.

In a new study, an interdisciplinary team of authors from the Max Planck Institute of Geoanthropology argue that the history of urbanism provides an important resource for understanding where our contemporary urban challenges come from, as well as how we might begin to address them.

The paper highlights the ways in which new methodologies are changing our understanding of past cities and providing a reference for urban societies navigating the intensifying climatic extremes of the 21st century.

These methods range from remote sensing techniques like LiDAR, which are documenting cities in places where urban life was once considered impossible, to biomolecular approaches like isotope analysis, which can provide insights into how cities have shaped different organisms and influenced human mobility and connectivity through time.

Meanwhile, the study of sediment cores and historical data can show how cities have placed adaptive pressures on different landscapes and human societies -- as they still do today.

As understanding of humanity's influence on the Earth system grows, urbanism is increasingly considered one of the most impactful forms of land use.

In this new study, the authors also highlight how multidisciplinary approaches, including Earth system modelling, are revealing the impacts that ancient and historical forms of urbanism had on land use, and, critically, how they compare to the impacts of urban areas today.

Throughout, the authors emphasize that the past does not just provide anecdotal insights, but rather numerical datasets of things like road lengths, building types, population sizes, economic output, environmental impacts, and more.

With advances in computational archaeology, this opens up the possibility of quantifying similarities and differences in urban pathways across space and time, directly linking the past to the present.

By reviewing diverse examples from around the world ranging from medieval Constantinople (now Istanbul) to 9th century Bagdad, from Great Zimbabwe to Greater Angkor in Cambodia, this new study highlights the potential of new methodological approaches to reveal historical legacies and predict trajectories of urbanism in the Anthropocene epoch.

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Discovery of immense fortifications dating back 4,000 years in north-western Arabia

The North Arabian Desert oases were inhabited by sedentary populations in the 4th and 3rd millennia BCE. A fortification enclosing the Khaybar Oasis -- one of the longest known going back to this period -- was just revealed by a team of scientists from the CNRS1 and the Royal Commission for AlUla (RCU). This new walled oasis is, along with that of Tayma, one of the two largest in Saudi Arabia. While a number of walled oases dating back to the Bronze Age had already been documented, this major discovery sheds new light on human occupation in north-western Arabia, and provides a better grasp of local social complexity during the pre-Islamic period.

Cross-referencing field surveys and remote sensing data with architectural studies, the team estimated the original dimensions of the fortifications at 14.5 kilometres in length, between 1.70 and 2.40 metres in thickness, and approximately 5 metres in height.

Preserved today over a little less than half of its original length (41%, 5.9 km and 74 bastions), this colossal edifice enclosed a rural and sedentary territory of nearly 1,100 hectares.

The fortification's date of construction is estimated between 2250 and 1950 BCE, on the basis of radiocarbon dating of samples collected during excavations.

While the study confirms that the Khaybar Oasis clearly belonged to a network of walled oases in north-western Arabia, the discovery of this rampart also raises questions regarding why it was built as well as the nature of the populations that built it, in particular their relations with populations outside the oasis.

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One of the largest magnetic storms in history quantified: Aurorae covered much of the night sky from the Tropics to the Polar Regions

In early November of this year, aurora borealis were observed at surprisingly low latitudes, as far south as Italy and Texas. Such phenomena indicate the impacts of a solar coronal mass ejection on the Earth's magnetic field and atmosphere. Far more dramatic than this recent light show was, it was nothing compared to a huge solar storm in February 1872. The resulting auroral display from that event ringed the globe and produced auroras observed in sites as close to the equator as Bombay and Khartoum. An international team consisting of scientists from nine counties has now published a detailed study of this historically important event, tracing its solar origin and widespread terrestrial impacts. Telegraph communications were widely disrupted by this storm, but in today's technologically dependent society, such a storm would disrupt power grids and satellite communications. Their findings confirm that such extreme storms are more common than previously thought.

In the modern world, we are increasingly dependent on technological infrastructure such as power grids, communication systems, and satellites.

However, this dependency makes us increasingly vulnerable to the effects of large geomagnetic storms.

"The longer the power supply could be cut off, the more society, especially those living in urban areas, will struggle to cope," Designated Assistant Professor Hayakawa, the lead author of the study, explains.

Such storms could be big enough to knock out the power grid, communication systems, airplanes, and satellites in the worst case.

"Could we maintain our life without such infrastructure?" Hayakawa comments: "Well, let us just say that it would be extremely challenging."

Such extreme storms are rare. In recent studies, two such storms stand out: the Carrington storm in September 1859 and the New York Railroad storm in May 1921.

The new study suggests that another storm, the Chapman-Silverman storm in February 1872, should also be considered as one of these extreme events.

At the time, the storm was big enough to affect the technological infrastructure even in the tropics.

Telegraph communications on the submarine cable in the Indian Ocean between Bombay (Mumbai) and Aden were disrupted for hours.

Similar disturbances were reported on the land line between Cairo and Khartoum.

The multidisciplinary team, consisting of 22 scientists, was led by Nagoya University in Japan (Hisashi Hayakawa), the US National Solar Observatory (Edward Cliver), and the Royal Observatory of Belgium (Frédéric Clette). The 22 researchers used historical records and modern techniques to assess the Chapman-Silverman storm from its solar origin to its terrestrial impacts.

For the solar origin, the group turned to largely forgotten sunspot records from historical archives, especially Belgian and Italian records.

For terrestrial impacts, they used geomagnetic field measurements recorded in places as diverse as Bombay (Mumbai), Tiflis (Tbilisi), and Greenwich to assess temporal evolution and storm intensity.

They also examined hundreds of accounts of visual aurora in different languages caused by the storm.

One of the more interesting aspects of the 1872 storm was that it likely originated in a medium-sized, but complex, sunspot group near the solar disk centre as confirmed by analyses of solar records from Belgium and Italy.

These findings suggest that even a medium-sized sunspot group triggered one of the most extreme magnetic storms in history.

Hayakawa and his colleagues extended their investigations of the historical aurorae by combing through records in libraries, archives, and observatories around the world.

They identified more than 700 auroral records that indicated that the night sky was illuminated by magnificent auroral displays from the polar regions to the tropics (down to ≈ 20° in latitude in both hemispheres).

"Our findings confirm the Chapman-Silverman storm in February 1872 as one of the most extreme geomagnetic storms in recent history. Its size rivalled those of the Carrington storm in September 1859 and the NY Railroad storm in May 1921," Hayakawa said.

"This means that we now know that the world has seen at least three geomagnetic superstorms in the last two centuries. Space weather events that could cause such a major impact represent a risk that cannot be discounted."

Hayakawa said: "Such extreme events are rare. On the one hand, we are fortunate to have missed such superstorms in the modern time. On the other hand, the occurrence of three such superstorms in 6 decades shows that the threat to modern society is real. Therefore, the preservation and analysis of historical records is important to assess, understand, and mitigate the impact of such events."

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Origin of ancient mummified baboons found in Egypt

In ancient Egypt, various deities were portrayed as animals. Thoth, the god of learning and wisdom was represented by a hamadryas baboon. Baboons, probably held in captivity in Egypt, were mummified as votive offerings after their deaths. Today, no wild baboons live in Egypt, and there is no evidence to suggest that these primates did so in the past. In an interdisciplinary project involving biologists, Egyptologists and anthropologists, Gisela Kopp, a biologist from Konstanz who conducts research on non-human primates, pursued the question of how and from where baboons came to Egypt. The results have been published in the current issue of the journal eLife.

Baboons were imported

To pay homage to the deity Thoth, baboons were probably imported from distant regions and kept in captivity in ancient Egypt. As studies of skeletons show, they had their dangerous canine teeth removed. To determine the geographic origin of the baboons, Gisela Kopp and her team used genetic analyses. The region from which the animals originate can be determined with the help of the mitochondrial genome of the animal mummies. The distribution of baboons across the African continent and their genetic diversity is well studied.

"We have comparative samples from almost all regions where baboons live today," Gisela Kopp says. These were supplemented with approximately 100 to 150-year-old specimens from museum collections. Comparisons of samples from the widely separated time periods are possible because the location of the different genetic variants of the baboon populations is very consistent over time.

Comparative sample points to Adulis

One of the study's collaborators, anthropologist Nathaniel Dominy from Dartmouth College in the United States, had already used stable isotopes to identify the respective geographic locations of mummified baboons. This method of using chemical signatures can be employed to distinguish between where animals were born and where they grew up. The study, published in 2020, was able to identify the Horn of Africa as the baboons' region of origin. Using genetic analysis, which has higher geographic precision and can also determine where the animals and their ancestors came from originally, the location was narrowed down to a well-defined area in Eritrea and neighbouring regions. A comparative sample that was most similar to the genetic variant of the mummy specimen originates from the coastal region in Eritrea, where, in ancient times, the port of Adulis was probably located. Ancient texts refer to Adulis as a trading place for luxury goods and animals.

The mummy specimen used by Gisela Kopp and her team was excavated in 1905 in the "Valley of the Monkeys" and is now held in the Musée des Confluences in Lyon. The mummy is estimated to date back to between 800 and 500 BCE in the Late Period of ancient Egypt. This is long before Adulis flourished as an important trading centre and port.

Early historical texts mention Punt as the baboons' place of origin, a legendary region from which Egypt imported luxury goods for centuries until early in the first millennium BCE. However, the exact location of Punt is unknown. "Egyptologists have long puzzled over Punt, since some scholars have seen it as a location in early global maritime trade networks, and thus the starting point for economic globalization," says Gisela Kopp.

Egyptology provides the link between Punt and Adulis

Punt is documented in ancient illustrations and texts from the same period as the mummy specimens. The Egyptological expertise in the project made it possible to link Punt to Adulis. "The specimen we studied fits chronologically with the last known expeditions to Punt. Geographically, however, it fits Adulis, a location that, centuries later, was known as a trading place, also for primates. We hypothesize that Punt and Adulis are two different names for the same place that were used at different points in time," Gisela Kopp says. And: "It was only after we put our biological findings in the context of historical research that the story really came together."

In the field of biology itself the findings are a scientific breakthrough, because it was the first time that ancient DNA from mummified non-human primates was analyzed successfully. This opens up opportunities to study, for example, the impact of human-wildlife interactions on genetic diversity and their role in the transmission of diseases. The contact ancient Egyptians had with exotic animals is evidence for early intensive interactions between wild animals and humans. The mass mummification of different animal species and primates is a very extraordinary cultural practice.

Read more at Science Daily

Why do some environmental shocks lead to disaster while others don't?

It's no longer just about stopping, but how we can live with climate change. To figure this out, we must delve into our cultures, as highlighted in a special issue of The Royal Society. A study by the Complexity Science Hub points out how our history could help guide the way.

Currently, we are grappling with a global crisis convergence. Various types of threats intersect, intertwine, and test our collective resilience, from climate change and economic inequality to political polarization. Although the scale and global reach of these challenges present new hurdles, these threats have been faced and, sometimes, overcome in the past. Societies today barely have time to recover from one crisis to the next, but we possess a significant advantage: knowledge. The knowledge we can obtain from our history through new methods.

DATA FROM MORE THAN 15O CRISES

CSH researchers Peter Turchin and Daniel Hoyer have pioneered fresh approaches to drawing lessons from history. Together with colleagues from different fields, they have compiled the Crisis Database (CrisisDB) as part of the Global History Databank Seshat, containing over 150 past crises spanning different time periods and regions.

When earthquakes shook the earth, droughts parched the land, or floods ravaged regions, some societies succumbed to social unrest, civil violence, or total collapse, while others exhibited resilience, maintaining essential social functions or even achieving improvement through systemic reforms that promoted well-being and increased democratic participation. Daniel Hoyer remarks, "What we observe is that not every ecological shock or climatic anomaly leads to collapse or even a severe crisis, and not every crisis involves a major environmental stressor." But what makes the difference? What drives collapse versus positive change?

DIVERGENT EXPERIENCES IN DIFFERENT TIMES AND PLACES

To illustrate the divergent dynamics experienced by past societies, and to highlight the comprehensiveness of their data, the researchers provide three examples. The Zapotec hilltop settlement of Monte Albán in southern Mexico emerged as the most significant settlement in the region. Extreme, persistent drought hit the region in the 9th century, and the once-great site of Monte Albán was entirely abandoned along with many other cities in Mesoamerica. However, recent research presented here shows that this was hardly a case of 'societal collapse', as many former residents of Monte Albán resettled in smaller communities nearby, likely without massive mortality, but rather through an ideological and socio-economic reorientation that also preserved many aspects of their society.

On the opposite end of the spectrum, the immensely wealthy Qing Dynasty in China proved resilient to adverse ecological conditions -- recurrent floods, droughts, swarms of locusts -- during the early part of their reign, but by the 19th century, social pressures had built up leaving them more vulnerable to these same challenges. It was in this period that suffered the Taiping Rebellion, often seen as the bloodiest civil war in human history, and ultimately collapsed completely in 1912 after 250 years of rule. Learn more about the causes in a new study.

In between, the researchers highlight the Ottoman Empire, which faced daunting environmental conditions during the 16th century, including recurrent droughts and the Little Ice Age, leading to social unrest and numerous rebellions led by disgruntled local officials and wealthy families, yet they managed to maintain key social and political structures and avoided collapse, ruling a large swath of territory for several hundreds of years more.

GENERALIZABLE TO MULTIPLE CASES

"Many studies typically concentrate on a single event or a specific society. However, it is only by exploring the responses of all, or at least many, societies affected by a particular climate 'regime' that we can ascertain the causal influence and overall effectiveness of the environmental stressor," Peter Turchin says. With this objective in mind, the researchers have developed a methodological framework aimed at producing insights that can be applied to numerous cases across different regions and time periods, helping identify the underlying causes of divergent outcomes.

UNDERSTANDING THE DYNAMICS

"The course of a crisis hinges on numerous factors. Environmental forces are undeniably pivotal, but it's not as straightforward as a specific climate event triggering a predetermined societal response," asserts Turchin. Instead, these forces interact with cultural, political, and economic dynamics. Only by comprehending these dynamics can we fathom the interactions. Through their work on the CrisisDB program, the researchers and colleagues aim to unveil these patterns and pinpoint the key factors that either fortify or undermine resilience to contemporary climate shocks.

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Causes of the Qing Dynasty's collapse: Parallels to today's instability

The Qing Dynasty in China, after over 250 years, crumbled in 1912. Led by the Complexity Science Hub (CSH), an international research team has pinpointed key reasons behind the collapse, revealing parallels to modern instability and offering vital lessons for the future.

China is considered today to be the world's largest economy (in terms of PPP). However, this position is not new. In 1820, China's economy already held the top spot, accounting for 32.9% of the global GDP. In the interim, there was a period of decline followed by a resurgence. In 1912, after over 250 years in power, the Qing Dynasty collapsed despite being considerably wealthier at the time than modern-day China. "This clearly demonstrates that any economy must be vigilant as circumstances can change, and sometimes rather rapidly," emphasizes Georg Orlandi, the study's first author.

SIMILAR ROOTS THEN AND NOW

"It's crucial to comprehend the origins of such instabilities. Assuming it's a thing of the past and can't recur would be a mistake. Such changes can indeed happen because the underlying mechanisms bear surprising similarities," CSH researcher Peter Turchin points out.

Scientists have been attempting to pinpoint the causes behind the fall of the Qing Dynasty for two centuries. Various factors had previously been proposed, including environmental disasters, foreign incursions, famines, or uprisings. However, "none of these factors provides a comprehensive explanation," notes Turchin.

THREE MAIN DRIVERS

Hence, in this study, researchers amalgamated various factors and discovered that three elements dramatically heightened socio-political pressures:

Firstly, there was a fourfold population explosion between 1700 and 1840. This resulted in reduced land per capita and caused an impoverishment of the rural populace.

Secondly, this led to increased competition for elite positions. While the number of contenders soared, the number of awarded highest academic degrees declined, reaching its nadir in 1796. Because such a degree was necessary for obtaining a position in the powerful Chinese bureaucracy, this mismatch between the number of positions and those desiring them created a large pool of disgruntled elite aspirants. The leaders of the Taiping Rebellion, perhaps the bloodiest civil war in human history, were all such failed elite-wannabes.

Thirdly, the state's financial burden escalated due to rising costs associated with suppressing unrest, declining per capita productivity, and mounting trade deficits stemming from depleting silver reserves and opium imports.

Collectively, these factors culminated in a series of uprisings that heralded the end of the Qing Dynasty and exacted a heavy toll in terms of Chinese lives lost.

THE QING WERE AWARE

According to the study's findings, social tensions had already peaked between 1840 and 1890. "Assuming that the Qing rulers were unaware of this mounting pressure would be erroneous," explains Turchin. The fact that the dynasty endured until 1912 rather underscores its institutional structures' robustness.

However, many of their attempted solutions proved short-sighted or inadequate to the task; for instance, the government raised the allowable quota for people passing certain degree exams but without increasing the number of available openings. This ended up exacerbating the already-building tensions. With the arrival of potent geopolitical challengers through the late 19th century, the rulers ultimately couldn't avert their downfall.

PREVENT INSTABILITY TODAY

We can draw valuable lessons from this historical process for the contemporary era and the future. Many nations worldwide are grappling with potential instability and conditions that closely resemble those of the Qing Dynasty. For instance, competition for top positions remains exceedingly fierce. Orlandi cautions, "When a large number of individuals vie for a limited number of positions, political decision-makers should view this as a red flag, as it can, at the very least, lead to heightened instability."

"Unfortunately, the corrosive impact of rising inequality and diminishing opportunities develop over longer time scales that make them hard to recognize," adds co-author and CSH Affiliated Researcher Daniel Hoyer, "let alone effectively combat within the short political cycles we see in many countries. Without long-term vision and targeted strategies to relieve these social pressures, many places are at risk of going the way of the Qing."

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Unraveling the long history of breast cancer formation

From the early stages of cell mutations starting in puberty to their manifestations as breast cancer in later years, the entire process has remained shrouded in mystery.

Now, a team of researchers at Kyoto University has revealed the mechanism by which breast cancer is formed in the cells of the mammalian epithelium, whose main function is to secrete milk.

According to the team's first analysis, approximately 20 mutations accumulate annually in each epithelial cell until menopause. After menopause, however, the mutation rate significantlydecreases.

"Additionally, our results suggest that estrogen influences mutation accumulation in mammary epithelium, which correlates with our discovery of decreased accumulation after childbirth," says corresponding author Seishi Ogawa of KyotoU's Graduate School of Medicine.

As 70% of breast cancers are understood to be estrogen-sensitive, Ogawa's team may shed light on estrogen's role in the initiation of breast cancer.

Further investigation of the genetic relationship between breast cancer, its surrounding lesions, and normal epithelial cells led to mapping breast cancer's translocation-positive expansion. During this expansion process, cells of multiple origins that would subsequently develop breast cancer manifested themselves at the average age of 30. Previous studies have focused on driver mutations -- the genetic changes in cells that are already cancerous -- leading to abnormal growth. But these findings only paint a partial picture of the process and do not reveal the timing and order of driver mutations or cancer formation.

"Normal-looking tissues may already contain numerous populations of non-cancer cells -- or clones -- that have acquired mutations in cancer-related genes," says co-author author Tomomi Nishimuraof KyotoU's Graduate School of Medicine.

After examining the similarities and differences in the mutations of both cancer and non-cancer lesions originating from the clones, the team reconstructed an evolutionary tree to visualize the unique pattern of cancer evolution.

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Scientists zero in on timing, causes of ice age mammal extinctions in southern California

The end of the last Ice Age also marked the end for more than three dozen genera of large mammals in North America, from mammoths and mastodons to bison and saber-toothed cats. Details concerning the precise timing and circumstances, however, have remained murky ever since.

A team of scientists that included Texas A&M University archaeologist Dr. Michael Waters recently focused on the well-known Rancho La Brea Tar Pits in southern California in their quest to provide answers to these questions, resulting in the most exact and detailed timeline for the extinctions that happened during the latter part of the Pleistocene period in North America, along with some foreboding insight into the area's present and future. Their work is featured on the cover of the current issue of Science.

Waters, a distinguished professor in the Department of Anthropology and director of the Center for the Study of the First Americans (CSFA), along with roughly a dozen fellow researchers, examined the timing and cause of the extinction of a variety of large mammals, known as megafauna, that got stuck in tar at Rancho La Brea, ensuring the preservation of their bones. The team used the radiocarbon dating method to date 169 bones from seven different animals -- bison, horse, camel and ground sloths as well as the carnivores that ate them, including the saber-toothed cat, dire wolf and American lion. They also compared those findings to regional pollen and charcoal records along with continent-wide data on human and large mammal populations.

Armed with their new data, the researchers subsequently used time-series modeling to produce the most detailed chronobiology to date, showing the relationships between climate and vegetation change, fire activity, human demographics and megafauna extinctions -- groundbreaking results they report in the Aug. 18 edition of the world-leading academic journal.

Waters says the team's findings reveal that Ice Age mammal populations in southern California were steady from 15,000 to around 13,250 years ago. Afterward, there was a sharp decline in the population of the seven animals studied, and they all became extinct between 13,070 to 12,900 years ago.

In an interesting modern-day parallel, this extinction event corresponds with a change in the environment from 13,300 to 12,900 years ago marked by warming and drying that made the land more vulnerable to fires in southern California. Charcoal records show that fires increased around 13,500 years ago and peaked between 13,200 and 12,900 years ago. Studies show that humans arrived in North America's Pacific coast 16,000 to 15,000 years ago and lived alongside the megafauna for 2,000 to 3,000 years before their extinction.

While humans hunted animals during this period, Waters says the impact of hunting on the demise of the megafauna likely was minor because of the low population of humans on the landscape. However, the fires would have been devastating, resulting in the loss of habitat causing the rapid decline and extinction of the megafauna in southern California. The study suggests these fires were ignited by humans, which had increased in number by that time.

"Fire is a way that small numbers of humans can have a large impact over a broad area," said Waters, who also cautions that climate changes observed in present-day California are similar to those of the late Pleistocene.

"This study has implications for the changes we see in southern California today," Waters added. "The temperatures are rising, and the area is drying. We also see a dramatic increase in fires. It appears that history may be repeating itself."

While Waters acknowledges that this is the story of extinction at Rancho La Brea, he says it has the potential to offer insights into when extinctions happened across all of North America.

"Mammoths and mastodons survived in many parts of North America until around 12,700 years ago," he added. "These animals were hunted by the Clovis people between about 13,000 and 12,700 years ago. We are now dating megafauna remains from other locations to give a broader understanding of the Rancho La Brea research in the context of North America."

The museum at La Brea Tar Pits holds the world's largest collection of fossils from the Ice Age and has been central to the study of animal and plant life at the end of the Pleistocene epoch for more than a century. Its naturally occurring asphalt pools entrapped and preserved the bones of thousands of individual animals representing dozens of megafaunal species during the last 60,000 years, enabling scientists to determine when different species disappeared from the ecosystem and why.

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4,000-year-old plague DNA found -- the oldest cases to date in Britain

Researchers at the Francis Crick Institute have identified three 4,000-year-old British cases of Yersinia pestis, the bacteria causing the plague -- the oldest evidence of the plague in Britain to date, reported in a paper published today in Nature Communications.

Working with the University of Oxford, the Levens Local History Group and the Wells and Mendip Museum, the team identified two cases of Yersinia pestis in human remains found in a mass burial in Charterhouse Warren in Somerset and one in a ring cairn monument in Levens in Cumbria.

They took small skeletal samples from 34 individuals across the two sites, screening for the presence of Yersinia pestis in teeth. This technique is performed in a specialist clean room facility where they drill into the tooth and extract dental pulp, which can trap DNA remnants of infectious diseases.

They then analysed the DNA and identified three cases of Yersinia pestis in two children estimated to be aged between 10-12 years old when they died, and one woman aged between 35-45. Radiocarbon dating was used to show it's likely the three people lived at roughly the same time.

The plague has previously been identified in several individuals from Eurasia between 5,000 and 2,500 years before present (BP), a period spanning the Late Neolithic and Bronze Age (termed LNBA), but hadn't been seen before in Britain at this point in time. The wide geographic spread suggests that this strain of the plague may have been easily transmitted.

This strain of the plague -- the LNBA lineage -- was likely brought into Central and Western Europe around 4,800 BP by humans expanding into Eurasia, and now this research suggests that it extended to Britain.

Using genome sequencing, the researchers showed that this strain of the Yersinia pestis looks very similar to the strain identified in Eurasia at the same time.

The individuals identified all lacked the yapC and ymt genes, which are seen in later strains of plague, the latter of which is known to play an important role in plague transmission via fleas. This information has previously suggested that this strain of the plague was not transmitted via fleas, unlike later plague strains such as the one that caused the Black Death.

Because pathogenic DNA -- DNA from bacteria, protozoa, or viruses which cause disease -- degrades very quickly in samples which might be incomplete or eroded, it's also possible that other individuals at these burial sites may have been infected with the same strain of plague.

The Charterhouse Warren site is rare as it doesn't match other funeral sites from the time period -- the individuals buried there appear to have died from trauma. The researchers speculate that the mass burial wasn't due to an outbreak of plague but individuals may have been infected at the time they died.

Pooja Swali, first author and PhD student at the Crick, said, "The ability to detect ancient pathogens from degraded samples, from thousands of years ago, is incredible. These genomes can inform us of the spread and evolutionary changes of pathogens in the past, and hopefully help us understand which genes may be important in the spread of infectious diseases. We see that this Yersinia pestis lineage, including genomes from this study, loses genes over time, a pattern that has emerged with later epidemics caused by the same pathogen."

Pontus Skoglund, group leader of the Ancient Genomics Laboratory at the Crick, said, "This research is a new piece of the puzzle in our understanding of the ancient genomic record of pathogens and humans, and how we co-evolved.

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Humanity's earliest recorded kiss occurred in Mesopotamia 4,500 years ago

Recent research has hypothesised that the earliest evidence of human lip kissing originated in a very specific geographical location in South Asia 3,500 years ago, from where it may have spread to other regions, simultaneously accelerating the spread of the herpes simplex virus 1.

But according to Dr Troels Pank Arbøll and Dr Sophie Lund Rasmussen, who in a new article in the journal Science draw on a range of written sources from the earliest Mesopotamian societies, kissing was already a well-established practice 4,500 years ago in the Middle East. And probably much earlier, moving the earliest documentation for kissing back 1,000 years compared to what was previously acknowledged in the scientific community.

"In ancient Mesopotamia, which is the name for the early human cultures that existed between the Euphrates and Tigris rivers in present-day Iraq and Syria, people wrote in cuneiform script on clay tablets. Many thousands of these clay tablets have survived to this day, and they contain clear examples that kissing was considered a part of romantic intimacy in ancient times, just as kissing could be part of friendships and family members' relations," says Dr Troels Pank Arbøll, an expert on the history of medicine in Mesopotamia.

He continues:

"Therefore, kissing should not be regarded as a custom that originated exclusively in any single region and spread from there but rather appears to have been practiced in multiple ancient cultures over several millennia."

Dr Sophie Lund Rasmussen adds:

"In fact, research into bonobos and chimpanzees, the closest living relatives to humans, has shown that both species engage in kissing, which may suggest that the practice of kissing is a fundamental behaviour in humans, explaining why it can be found across cultures."

Kissing as potential transmitter of disease

In addition to its importance for social and sexual behaviour, the practice of kissing may have played an unintentional role in the transmission of microorganisms, potentially causing viruses to spread among humans.

However, the suggestion that the kiss may be regarded as a sudden biological trigger behind the spread of particular pathogens is more doubtful. The spread of the herpes simplex virus 1, which researchers have suggested could have been accelerated by the introduction of the kiss, is a case in point:

"There is a substantial corpus of medical texts from Mesopotamia, some of which mention a disease with symptoms reminiscent of the herpes simplex virus 1," Dr Arbøll remarks.

He adds that the ancient medical texts were influenced by a variety of cultural and religious concepts, and it therefore must be emphasized that they cannot be read at face value.

"It is nevertheless interesting to note some similarities between the disease known as bu?shanu in ancient medical texts from Mesopotamia and the symptoms caused by herpes simplex infections. The bu'shanu disease was located primarily in or around the mouth and throat, and symptoms included vesicles in or around the mouth, which is one of the dominant signs of herpes infection."

"If the practice of kissing was widespread and well-established in a range of ancient societies, the effects of kissing in terms of pathogen transmission must likely have been more or less constant," says Dr Rasmussen.

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Scientists discover fire records embedded within sand dunes

Knowing how the frequency and intensity of wildfires has changed over time offers scientists a glimpse into Earth's past landscapes, as well as an understanding of future climate change impacts. To reconstruct fire records, researchers rely heavily on sediment records from lake beds, but this means that fire histories from arid regions are often overlooked. Now, a new study shows that sand dunes can serve as repositories of fire history and aid in expanding scientific understanding of fire regimes around the world.

Published May 11 in Quaternary Research, the study is the first to examine sedimentary records preserved in foot-slope deposits of sand dunes. The research team, led by Nicholas Patton, Ph.D., a postdoctoral researcher now at DRI, studied four sand dunes at the Cooloola Sand Mass in Australia. Australia is one of the world's most fire-prone landscapes, with a long history of both natural and cultural burning, and vast expanses without lakes or ponds to gather sedimentary records from. The researchers aimed to prove that these sand dune deposits could be used to reconstruct reliable, multi-millennial fire histories. These previously unrecognized archives could potentially be used in arid regions around the world to fill knowledge gaps in places where fire shapes the landscape.

"Many fire and paleoclimate records are located where there's a lot of water bodies such as lakes, peats, and bogs," Patton says. "And because of this, most global models really have a bias towards temperate regions."

The Cooloola Sand Mass consists of enormous -- up to 240-meter-tall -- sand dunes that build up at the coast and gradually shift inland from the power of the wind. By identifying the age of the dunes using a technique called optically stimulated luminescence dating, or OSL, Patton's team found that the four dunes span the Holocene, representing the last approximately 12,000 years.

Once a dune is stable, meaning it is no longer growing but slowly degrading, the force of gravity acts on the dune slopes to collect falling sand at the base, along with the remnants of charcoal from local fires that deposited on the dune's surface. This sediment builds up over time, layering charcoal from fire events that can be reliably identified using radiocarbon dating.

"We were digging soil pits at the base of the dunes and were seeing a lot of charcoal -- more charcoal than we expected," says Patton. "And we thought maybe we could utilize these deposits to reconstruct local fires within the area."

Patton found that on the younger dunes (at 500 years old and 2,000 years old), charcoal layers represented individual fires, because the steep slope of the dunes quickly buried each layer. However, the older dunes (at 5,000 years old and 10,000 years old) had more gradual slopes that blended charcoal from different fires over time, providing a better understanding of periods of increased or decreased fire frequency.

The dunes offered localized fire histories from within an approximate 100-meter radius, so fire records vary somewhat amongst the four dunes, which spanned approximately 2 kilometers. However, Patton's team compared their results to other fire records from the region found in lake and swamp deposits. Similar to the regional records, their findings showed three major periods of fire activity over the past 7,000 years.

The researchers write that similar records are likely held in sand dunes around the world, and that regions like California and the Southwest U.S. could benefit from a better understanding of regional fire history. Embedded within the fire records is not only information about natural wildfires, but also the way that humans influenced fire regimes.

"Fire histories are important for understanding how fire was used in the past for cultural purposes, whether that was to clear fields for agriculture or for hunting," Patton says.

Patton hopes to continue this line of research at other dunes near the Cooloola Sand Mass that are nearly 1 million years old to obtain a long-term fire history for the region. Because Australia has had human communities for at least 60-70 thousand years, and quite possibly longer, these records could help understand the relationship between humans and historical fire regimes.

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Culprit behind destruction of New York's first dinosaur museum revealed

A new paper from the University of Bristol rewrites the history of the darkest, most bizarre event in the history of palaeontology.

In New York, in May of 1871, the partially built, life-size models of dinosaurs and other prehistoric creatures destined for a prestigious new museum in Central Park were totally destroyed in a violent act of malicious vandalism by a gang of thugs with sledgehammers. The shattered pieces were carted away and buried somewhere in the park, never to be seen again.

Until now, the heinous act had been tributed to former American politician William 'Boss' Tweed.

But now, a new paper from Ms Victoria Coules of Bristol's Department of History of Art and Professor Michael Benton of Bristol's School of Earth Sciences sheds new light on the incident and, contrary to previous accounts, identifies who was really behind the order and what drove them to such wanton destruction -- an odd man known as Henry Hilton, the Treasurer and VP of Central Park.

"It's all to do with the struggle for control of New York city in the years following the American Civil War (1861-1865)," said Ms Coules. "The city was at the centre of a power struggle -- a battle for control of the city's finances and lucrative building and development contracts."

As the city grew, the iconic Central Park was taking shape. More than just a green space, it was to have other attractions, including the Paleozoic Museum. British sculptor Benjamin Waterhouse Hawkins, who had created the Crystal Palace Dinosaurs, the life-size models of prehistoric creatures in London -- had travelled to America and was commissioned to build American versions of the models for the Paleozoic museum.

But the notorious William "Boss" Tweed had taken command of the city and, in sweeping changes to the city's governance, put his own henchmen in charge of city departments -- including Central Park. They cancelled the partially complete project in late 1870, and there the matter would have lain but in May 1871 someone ordered the gang of workmen to destroy all of its partly finished contents.

Professor Benton explains: "Previous accounts of the incident had always reported that this was done under the personal instruction of "Boss" Tweed himself, for various motives from raging that the display would be blasphemous, to vengeance for a perceived criticism of him in a New York Times report of the project's cancellation."

"Reading these reports, something didn't look right," Ms Coules said. "At the time Tweed was fighting for his political life, already accused of corruption and financial wrong-doings, so why was he so involved in a museum project?" She added, "So we went back to the original sources and found that it wasn't Tweed -- and the motive was not blasphemy or hurt vanity."

The situation was complicated by two other projects in development at the same time in Central Park, the American Museum of Natural History (AMNH) and the Central Park Zoo. But, as Professor Benton explained, "drawing on the detailed annual reports and minutes of Central Park, along with reports in the New York Times, we can show that the real villain was one strange character by the name of Henry Hilton."

Ms Coules adds: "Because all the primary sources are now available online, we could study them in detail -- and we could show that the destruction was ordered in a meeting by the real culprit, Henry Hilton, the Treasurer and VP of Central Park -- and it was carried out the day after this meeting."

Hilton was already notorious for other eccentric decisions. When he noticed a bronze statue in the Park, he ordered it painted white, and when a whale skeleton was donated to the American Museum of Natural History, he had that painted white as well. Later in life, other ill-judged decisions included cheating a widow out of her inheritance, squandering a huge fortune, and trashing businesses and livelihoods along the way.

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New, exhaustive study probes hidden history of horses in the American West

A team of international researchers has dug into archaeological records, DNA evidence and Indigenous oral traditions to paint what might be the most exhaustive history of early horses in North America to date. The group's findings show that these beasts of burden may have spread throughout the American West much faster and earlier than many European accounts have suggested.

The researchers, including several scientists from the University of Colorado Boulder, published their findings today in the journal Science.

To tell the stories of horses in the West, the team closely examined about two dozen sets of animal remains found at sites ranging from New Mexico to Kansas and Idaho. The researchers come from 15 countries and multiple Native American groups, including the Lakota, Comanche and Pawnee nations.

"What unites everyone is the shared vision of telling a different kind of story about horses," said William Taylor, a corresponding author of the study and curator of archaeology at the CU Museum of Natural History. "Focusing only on the historical record has underestimated the antiquity and the complexity of Indigenous relationships with horses across a huge swath of the American West."

For many of the scientists involved, the research holds deep personal significance, added Taylor, who grew up in Montana where his grandfather was a rancher.

"We're looking at parts of the country that are extraordinarily important to the people on this project," he said.

The researchers drew on archaeozoology, radiocarbon dating, DNA sequencing and other tools to unearth how and when horses first arrived in various regions of today's United States. Based on the team's calculations, Indigenous communities were likely riding and raising horses as far north as Idaho and Wyoming by at least the first half of the 17th Century -- as much as a century before records from Europeans had suggested.

Groups like the Comanche, in other words, may have begun to form deep bonds with horses mere decades after the animals arrived in the Americas on Spanish boats.

The results line up with a wide range of Indigenous oral histories.

"All this information has come together to tell a bigger, broader, deeper story, a story that natives have always been aware of but has never been acknowledged," said Jimmy Arterberry, co-author of the new study and tribal historian of the Comanche Nation in Oklahoma.

Study co-author Carlton Shield Chief Gover agreed, noting that the love of horses may be one thing that extends across societies and borders.

"People are fascinated by horses. They've grown up with horses," said Shield Chief Gover, a citizen of the Pawnee Nation of Oklahoma and curator for public anthropology at the Indiana University Museum of Archaeology and Anthropology. "We can talk to one another through our shared love of an animal."

Mud Pony

For many Native American communities that shared love goes a long way back.

The Pawnee, for example, tell the story of "Mud Pony," a boy who began seeing visions of strange creatures in his sleep.

"He makes these little mud figurines of these animals he sees in his dreams, and, overnight, they become alive," Shield Chief Gover said. "That's how you get horses."

European historical records from the colonial period, however, have tended to favor a more recent origin story for horses in the West. Many scholars have suggested that Native American communities didn't begin caring for horses until after the Pueblo Revolt of 1680. During this event, Pueblo people in what is today New Mexico temporarily overthrew Spanish rule, releasing European livestock in the process.

Taylor, also an assistant professor of anthropology at CU Boulder, and his colleagues didn't think it fit as an origin story for the relationships between humans and horses in the West: "We thought: There's something fishy about this story."

Clues in bone

With funding from the U.S. National Science Foundation (NSF), they formed an equine dream team that includes archaeologists from the University of Oklahoma and University of New Mexico. Geneticist Ludovic Orlando and Lakota scholar Yvette Running Horse Collin took part from the University of Toulouse.

"This research demonstrates how multiple different types of data can be integrated to address the fascinating historical question of how and when horses spread across the West," said NSF Archaeology program director John Yellen.

The researchers began collecting as much data as they could on horses remains from the West. DNA evidence, for example, suggests that most Indigenous horses had descended from Spanish and Iberian horses, with British horses becoming more common in the 18th and 19th Centuries.

"Our analyses show it was born and raised locally," Taylor said. "It was cared for, and when that animal passed, there was extraordinary significance to that event."

The remains of this horse, along with several others from the study, also seemed to date back to around the turn of the 17th Century, decades before the start of the Pueblo Revolt.

How animals like it arrived in Wyoming isn't clear, but it's likely that Europeans weren't involved in their initial transport.

Shield Chief Gover explained that few Indigenous people will be surprised by the results of the study. But the team's findings may help to illustrate for academic scientists just how important these animals were to the history of Indigenous peoples. The Pawnee, who lived in Nebraska, for example, rode horses on twice-a-year buffalo hunts, traveling farther and faster into the "sea of grass" of the Great Plains. Comanche also galloped on horseback to hunt buffalo, while owning a lot of horses was a sign of wealth.

"I don't want to diminish the reverence and the respect we have for horses," Arterberry said. "We see them as gifts the Creator gave us, and, because of that, we survived and thrived and became who we are today."

Respecting horses

Study co-author Chance Ward, a master's student in Museum and Field Studies at CU Boulder, would like to see the archaeology community begin to treat those relationships with more respect. He was born and raised on the Cheyenne River Reservation in South Dakota, which is home to four bands of the Lakota Nation. Ward grew up listening to his mother's childhood stories about riding ponies in the Bear Creek community. His father's parents started a ranch on the reservation where members of the family practice rodeo today.

He explained that many researchers don't handle animal remains with the same care they reserve for cultural objects and human remains.

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Codebreakers crack secrets of Mary Queen of Scots' lost letters

Secret, coded letters penned by Mary Queen of Scots while she was imprisoned in England by her cousin Queen Elizabeth I have been uncovered by a multidisciplinary team of international codebreakers.

The contents of the letters were believed for centuries to have been lost. That was until George Lasry, a computer scientist and cryptographer, Norbert Biermann, a pianist and music professor, and Satoshi Tomokiyo who is a physicist and patents expert, stumbled upon them while searching the national library of France's -- Bibliothèque nationale de France's (BnF) -- online archives for enciphered documents.

The trio only discovered Mary was the author after solving her sophisticated cipher system. Their decipherment work of 57 letters, which is presented in the peer-reviewed journal Cryptologia, reveals approximately 50 new scripts previously unknown to historians.

These date from 1578 to 1584, a few years before her beheading on this very day 436 years ago -- 8th February, 1587.

Mary's correspondences expose fascinating insights into her captivity. Most are addressed to Michel de Castelnau de Mauvissière, the French ambassador to England. He was a supporter of Catholic Mary who was under the Earl of Shrewsbury's custody when she wrote them.

"Upon deciphering the letters, I was very, very puzzled and it kind of felt surreal," says lead author Lasry, who is also part of the multi-disciplinary DECRYPT Project -- involving several universities in Europe, with the goal of mapping, digitizing, transcribing, and deciphering historical ciphers.

"We have broken secret codes from kings and queens previously, and they're very interesting but with Mary Queen of Scots it was remarkable as we had so many unpublished letters deciphered and because she is so famous.

"This is a truly exciting discovery."

He added: "Together, the letters constitute a voluminous body of new primary material on Mary Stuart -- about 50,000 words in total, shedding new light on some of her years of captivity in England.

"Mary, Queen of Scots, has left an extensive corpus of letters held in various archives. There was prior evidence, however, that other letters from Mary Stuart were missing from those collections, such as those referenced in other sources but not found elsewhere.

"The letters we have deciphered … are most likely part of this lost secret correspondence."

One of the 16th century's most famous historical figures, Mary was first in line of succession to the English throne after her cousin Elizabeth.

Catholics considered Mary to be the legitimate sovereign and Elizabeth had her imprisoned for 19 years because she was seen as a threat. Mary was eventually executed aged 44 for her alleged part in a plot to kill Elizabeth.

During her time in captivity, Mary communicated with her associates and allies through extensive efforts to recruit messengers and to maintain secrecy.

The existence of a confidential communication channel between Mary and Castelnau is well-known to historians, and even to the English government at the time.

But Lasry and his fellow codebreakers provide new evidence that this exchange was already in place as early as May 1578 and active until at least mid-1584.

Using computerized and manual techniques, the study authors decoded the letters which show the challenges Mary faced maintaining links with the outside world, how the letters were carried and by whom.

Key themes referred to in Mary's correspondence include complaints about her poor health and captivity conditions, and her negotiations with Queen Elizabeth I for her release, which she believes are not conducted in good faith.

Her mistrust of Elizabeth's spymaster Sir Francis Walsingham is also apparent, as well as her animosity for Robert Dudley, Earl of Leicester and a favourite of Elizabeth. She also expresses her distress when her son James (future King James I of England) is abducted in August 1582, and her feeling they have been abandoned by France.

Writing in this Special Issue version of Cryptologia, Lasry and hisco-authors describe how they first came across the letters. Some were in a large set of unmarked documents in cipher and using the same set of graphical symbols.

The BnF catalogue listed them as from the first half of the 16th century, and related to Italian matters. However, the study authors say they 'quickly realised' -- after starting to crack the code -- they were written in French and 'had nothing to do with Italy'.

Their detective work revealed verbs and adverbs often in the feminine form, several mentions of captivity, and the name 'Walsingham' which arose the suspicion that they might be from Mary, Queen of Scots.

This fact was confirmed by comparing them with the plaintext of letters in Walsingham's papers in the British Library and through other methods. A search for similar letters in BnF collections uncovered 57 letters with the same cipher.

Commenting on the new paper, Mary Queen of Scots expert, John Guy, who wrote the 2004 biography of Mary Queen of Scots which led to a major Hollywood film, says this is the most significant find about Mary for a century.

"This discovery is a literary and historical sensation. Fabulous! This is the most important new find on Mary Queen of Scots for 100 years. I'd always wondered if de Castelnau's originals could turn up one day, buried in the Bibliotheque Nationale de France or perhaps somewhere else, unidentified because of the ciphering.

"And now they have."

Lasry and his co-authors suggest, too, that other enciphered letters from Mary which are known to have existed may still be missing. A physical inspection of documents, as well as online searches, are needed to uncover these, they add.

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Archaeologists uncover oldest known projectile points in the Americas

Oregon State University archaeologists have uncovered projectile points in Idaho that are thousands of years older than any previously found in the Americas, helping to fill in the history of how early humans crafted and used stone weapons.

The 13 full and fragmentary projectile points, razor sharp and ranging from about half an inch to 2 inches long, are from roughly 15,700 years ago, according to carbon-14 dating. That's about 3,000 years older than the Clovis fluted points found throughout North America, and 2,300 years older than the points previously found at the same Cooper's Ferry site along the Salmon River in present-day Idaho.

The findings were published today in the journal Science Advances.

"From a scientific point of view, these discoveries add very important details about what the archaeological record of the earliest peoples of the Americas looks like," said Loren Davis, an anthropology professor at OSU and head of the group that found the points. "It's one thing to say, 'We think that people were here in the Americas 16,000 years ago;' it's another thing to measure it by finding well-made artifacts they left behind."

Previously, Davis and other researchers working the Cooper's Ferry site had found simple flakes and pieces of bone that indicated human presence about 16,000 years ago. But the discovery of projectile points reveals new insights into the way the first Americans expressed complex thoughts through technology at that time, Davis said.

The Salmon River site where the points were found is on traditional Nez Perce land, known to the tribe as the ancient village of Nipéhe. The land is currently held in public ownership by the federal Bureau of Land Management.

The points are revelatory not just in their age, but in their similarity to projectile points found in Hokkaido, Japan, dating to 16,000-20,000 years ago, Davis said. Their presence in Idaho adds more detail to the hypothesis that there are early genetic and cultural connections between the ice age peoples of Northeast Asia and North America.

"The earliest peoples of North America possessed cultural knowledge that they used to survive and thrive over time. Some of this knowledge can be seen in the way people made stone tools, such as the projectile points found at the Cooper's Ferry site," Davis said. "By comparing these points with other sites of the same age and older, we can infer the spatial extents of social networks where this technological knowledge was shared between peoples."

These slender projectile points are characterized by two distinct ends, one sharpened and one stemmed, as well as a symmetrical beveled shape if looked at head-on. They were likely attached to darts, rather than arrows or spears, and despite the small size, they were deadly weapons, Davis said.

"There's an assumption that early projectile points had to be big to kill large game; however, smaller projectile points mounted on darts will penetrate deeply and cause tremendous internal damage," he said. "You can hunt any animal we know about with weapons like these."

These discoveries add to the emerging picture of early human life in the Pacific Northwest, Davis said. "Finding a site where people made pits and stored complete and broken projectile points nearly 16,000 years ago gives us valuable details about the lives of our region's earliest inhabitants."

The newly discovered pits are part of the larger Cooper's Ferry record, where Davis and colleagues have previously reported a 14,200-year-old fire pit and a food-processing area containing the remains of an extinct horse. All told, they found and mapped more than 65,000 items, recording their locations to the millimeter for precise documentation.

The projectile points were uncovered over multiple summers between 2012 and 2017, with work supported by a funding partnership held between OSU and the BLM. All excavation work has been completed and the site is now covered. The BLM installed interpretive panels and a kiosk at the site to describe the work.

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Ancient genomes reveal hidden history of human adaptation

The use of ancient DNA, including samples of human remains around 45,000 years old, has shed light on a previously unknown aspect of human evolution.

Dr Yassine Souilmi, Group Leader at the University of Adelaide's Australian Centre for Ancient DNA, co-led the new study published in Nature Ecology and Evolution.

"It was widely believed the genetics of our human ancestors didn't change due to environmental pressures as much as other animals, due to our enhanced communication skills and ability to make and use tools," Dr Souilmi said.

"However, by comparing modern genomes with ancient DNA, we discovered more than 50 cases of an initially rare beneficial genetic variant becoming prevalent across all members of ancient human groups.

"In contrast to many other species, evidence for this type of adaptive genetic change has been inconsistent in humans. This discovery consequently challenges the prevailing view of human adaptation, and gives us a new and exciting insight into how humans have adapted to the novel environmental pressures they encountered as we spread across the planet."

Co-lead author Dr Ray Tobler -- an Adjunct Fellow at the University of Adelaide and a DECRA fellow at the Australian National University -- said examining ancient DNA has been critical in unlocking the secrets of human evolution.

"We believed historical mixing events between human groups might have hidden signs of genetic changes in modern human genomes," Dr Tobler said.

"We examined DNA from more than 1,000 ancient genomes, the oldest which was around 45,000 years old, to see if certain types of genetic adaptation had been more common in our history than studies of modern genomes had suggested."

Professor Christian Huber, a senior author of the research paper, is an Adjunct Fellow at the University of Adelaide and an Assistant Professor at Penn State University.

"The use of ancient genomes was crucial because they preceded major historical mixing events that have radically reshaped modern European genetic ancestry," Professor Huber said.

"This allowed the recovery of historical signs of adaptation that are invisible to standard analysis of modern genomes."

Established in 2005, the Australian Centre for Ancient DNA is a world leader in the research and development of advanced ancient DNA approaches for evolutionary, environmental and conservation applications.

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