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New population model identifies phases of human dispersal across Europe

University of Cologne—An interdisciplinary research team from the University of Cologne’s Institute of Geophysics and Meteorology and the Department of Prehistoric Archaeology has developed a new model*, the “Our Way Model”. They modelled the movements and population densities over time and space during the Aurignacian (approximately 43,000 to 32,000 years ago) to better understand how the first anatomically modern humans populated Europe. The model reveals four phases of the process. The first phase saw a slow expansion of human settlement from the Levant to the Balkans, followed by the second phase of rapid expansion into western Europe. The subsequent third phase was characterized by a decline in human population, and the fourth phase brought regional increases in population density and further advances into previously unsettled areas of Great Britain and the Iberian Peninsula. The results have been published under the title ‘Reconstruction of human dispersal during Aurignacian on pan-European scale’ in Nature Communications.

The interdisciplinary collaboration between climate scientists and archaeologists enabled the team to examine how climate change influenced human dispersal quantitatively. Early anatomically modern humans survived as hunter-gatherers for extremely long periods. When they started spreading across Europe, global climatic conditions were different from today: The prevailing cooler and drier climate of the late Last Glacial Period was repeatedly interrupted by warmer interglacial periods, with some changes occurring abruptly and others gradually.

Reasons for human dispersal to Europe were likely diverse, including human exploratory spirit, evolution in social structure and progress in technology. The newly developed model, however, allowed the research team to clearly demonstrate how climate change impacted human dispersal. Previous numeric models of long-term dispersals of human populations on continental scales commonly relied on so called diffusion-reaction equations, i.e., a combination of slow, continuous dispersal in all directions driven by the constant reproducing and growing population. Agent-based models focusing on individual or group motivations of humans to migrate, in turn, are more popular on smaller scales. Recent new models feature data from paleoclimate models in their calculations, but focus on Net Primary Production, an indicator for the amount of stored CO2 in plants and animals, as a proxy for food availability and human mobility. The disadvantage of this approach is that it does not consider the accessibility and availability of these food sources, as only a fraction of them were usable by humans.

The research team assumes that early habitation in Europe involved highly complex processes of advance, retreat, abandonment and resettlement, driven by climatic changes as well as humans’ ability to adapt. The “Our Way Model” simulates human dispersal in two main steps: first, combining climate and archaeological data to model the Human Existence Potential (HEP), and second, modelling the human population dynamics constrained by the HEP. HEP defines the likelihood of human existence under climate and environmental conditions for a given culture. This vital quantity is estimated using an HEP model that takes into account paleoclimatic data for known archaeological sites. This machine learning approach constructs the climatic constraints for the Aurignacian culture, estimating which climate conditions humans of that culture preferred to live in. The trained model is then applied to estimate the spatial and temporal HEP patterns using data simulated by the so-called Global Climate Model as well as oxygen isotope data from Greenland ice cores.

The results showed that a first phase of relatively slow westward expansion from the Levant to the Balkans (approximately 45.000 to 43.000 years ago) was followed by a second phase of rapid expansion into western Europe (approximately 43.250 to 41.000 years ago). Although interrupted by brief setbacks, Homo sapiens populations now rapidly reached an estimated number of 60.000 people across Europe, spread across all the known archaeological sites during this period. The subsequent third phase was characterized by a decline in the human population, both in terms of its size and density as well as the area occupied by the population (41.000 to 39.000 years ago). This development resulted from a prolonged severe cold period which lasted almost 3.000 years, known as the GS9/HE4 period.  However, according to the model, humans survived in the climate shadows of large topography (e.g., the Alpes), which they had just occupied in the previous phase. In the fourth phase, when HEP conditions improved again, the population quickly recovered and grew further, starting at around 38.000 years ago. Regional increases in population density and further advances into previously unsettled areas of Great Britain and the Iberian Peninsula, which the model showed, are broadly in line with the archaeological evidence.

The HEP maps indicate that at the end of this process, parts of the human population were better adapted to cold climatic conditions than others, allowing them to push the boundaries of previously settled environments. “Regional studies can hardly capture all factors at play when trying to reconstruct human dispersal, including how they work together at different scales and contribute to overall long-term trends. This is a major advantage of the new modelling approach”, said Dr Isabell Schmidt at the Department of Prehistoric Archaeology.

In further research, the team will test the underlying assumptions made in the model, focusing on the role of cultural evolution in the human dispersal process. The project Human and Earth System Coupled Research (HESCOR) at the University of Cologne will integrate further aspects of Human-Earth system interactions into the model.

Article Source: University of Cologne news release. Image, Top Left: Pixabay

*Reconstruction of human dispersal during Aurignacian on pan-European scale, Nature Communications, 28-Aug-2024. 10.1038/s41467-024-51349-y 

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Political Collapse: Lessons From Fallen Empires

Richard E. Blanton is professor emeritus of anthropology at Purdue University.

Gary M. Feinman is a MacArthur Curator of Anthropology at the Field Museum of Natural History in Chicago, Illinois.

Stephen A. Kowalewski is professor emeritus of anthropology at the University of Georgia.

Lane F. Fargher-Navarro is the director of research at the Past Foundation, Ohio State University.

Our investigation of the disastrous society-wide collapses of four premodern polities, China’s Ming Dynasty, the South Asian Mughal Empire, the High Roman Empire, and Renaissance Venice led to the discovery of an unexpected historical pattern. This revelation was not evident before these sudden collapses as all four polities had demonstrated forms of governance that persisted for centuries, had been among the wealthiest and best-governed polities of their eras, and had embraced policies fostering inclusiveness and egalitarianism that engendered strong support from the majority of their citizens.

We could not identify any exogenous causal factors for the collapses—such as drought, epidemic, or conquest by a more powerful foe (three of the four eventually were conquered, but only after their governments were considerably weakened)—adding to our confusion about what led to these major political transformations.

To understand the reasons for the political breakdowns, we decided to revisit an earlier article in which we had posited an answer to this question when it became increasingly clear to us that the conflictive political culture of the contemporary U.S. presents striking parallels with what we had discovered. We aim to reexamine our article to bring a comparative perspective on historically well-known episodes of collapse, their causes, and negative outcomes, and to alert U.S. citizens of the potential dangers we face, so we can highlight the need to take urgent corrective actions. We begin by referring to recent works by political scientists and anthropologists that provided theoretical context for our arguments.

Collective Action Theory Expands Our Understanding of Governance

In all four instances, collapse followed quickly after the leaders of these polities inexplicably and suddenly abandoned principles and practices that had successfully underpinned state-building and social stability. Their actions initiated a cascading series of events that brought a rapid decline in many aspects of society, which extended beyond the government. But why would the actions of just a few people have such severe consequences for otherwise endurable and well-organized polities?

We identified a plausible answer to this question when we considered collapse from the vantage of recently developed theories of human cooperation developed by political economists Margaret Levi and Elinor Ostrom, along with several others. The cooperation ideas intrigued us because they potentially laid down a pathway to evaluate traditional claims that state-building did not result from cooperation in premodern times, but from the actions of the autocratic elite who coercively gained dominion over subservient and easily mystified subaltern subjects. A reliance on coercion was foundational for the traditional Western understanding that the rise of democracy in Classical Athens 2,600 years ago was an exceptional event that set Western (“Occidental”) political history on a separate and democratic track, sharply different from the “Oriental” autocracies. But is this entrenched presumption correct?

Humans as ‘Contingent Cooperators’

The most salient feature of collective action theory separating it from the Orientalist tradition is that it does not presume mystified subaltern subjects nor coercive leadership. The theory hypothesizes that both ruling authorities and subjects are thoughtful social actors (“contingent cooperators”) who will agree to limit their selfish actions when they perceive that the actions of others are consistent with mutual benefit (“contingent mutuality”).

Our recent work in this regard has supported the hypothesis as applied to state formation. What we have found is that subjects are more likely to gain confidence in governing authorities and the policies and practices of a government based on the degree to which the leadership willingly provides elements of what is called “good government” (or “good governance”).

Good governance includes the degree to which leadership will accept limits on its power, is willing to develop the governing capacity to identify and punish official corruption, is willing to provide citizens access to an impartial judiciary, and is prepared to implement equitable taxation, to open up access to positions of governing authority without favoritism, and to provide public goods beneficial to all households.

A key aspect of good governance is that if its benefits foster citizen confidence and compliance with obligations, its practices and principles must be judiciously adhered to, and good governance benefits must be made available across the realm without favoritism. We discovered that in instances where mutual benefit and good governance are key, state-builders and citizens recognized that impartiality was threatened when a leader’s power, or the state itself, was religiously sacralized. The same threat was felt when the state gained legitimacy and fiscal benefit by associating or controlling a particular religious institution (analogous to the contemporary concept of separation of church and state).

The population of Renaissance Venice, for example, was largely Catholic, yet featured considerable cultural diversity while also depending on trade relations with merchants who belonged to diverse cultures and religions. Correspondingly, strict rules prohibited affiliations of the leadership and their immediate family members with any religious institution. In South Asia, the Mughal Emperor Akbar instituted a strong program for governing in a diverse region that mandated religious neutrality of the state and encouraged reasoned dialogues between religious and political leaders. The Roman and Ming leaderships certified their legitimacy to govern, not as religiously sanctified beings, but as leaders whose actions were expected to benefit society. The policy of the Ming Dynasty also emphasized the need for neutrality in its dealings with the three main religions of its time.

A Cross-Cultural Study of Premodern States

We coded the good governance attributes across a worldwide sample of 30 premodern polities, and subsequent archaeological work by us and others has provided additional pertinent data. We also considered other variables that we hypothesized might enrich our understanding of the causes and consequences of mutual benefit and good governance; for example, we coded for demographic trends, which are population growth/loss, material standard of living of households, and the frequency of political struggles and organized opposition to state policies and practices. We also coded the relative severity of social, demographic, and agricultural changes after the collapse of the four polities.

Was Western Political History Really Unique?

Armed with a new theory, good governance measures to evaluate it, and a vast array of descriptive studies available from ethnographic, historical, and archaeological sources, we dwelled on the question: Was Western political history really unique? We know that coercive and autocratic states did exist in the past, as they still do today, but were there also experiments in state-building, outside of Western history, which were based on contingent mutual benefit and good governance, and were they similar to democracy? The coding of good governance variables yielded a surprising answer to this question as we were able to identify such experiments.

Although there is considerable variation in the details of governance across these cases, we identified forms of governing outside of Western history in which the central force guiding political change was contingent on the bond of obligation between governing authorities and subjects rather than on coercion. Further, in such cases, we also found that mutual benefit and good governance brought numerous advantageous downstream consequences for their respective populations.

For example, compared with the more autocratic and coercive states, the collectively organized polities were more politically stable, in part because public safety was greatly enhanced, there were far fewer episodes of anti-state movements (although disgruntled elites often would militate against the more egalitarian and inclusive policies), and there was a reduction in the frequency of internal conflicts between ethnic groups or religious groups.

As a result of these outcomes, resulting in part from the fact that states organized based on mutual benefit and good governance, citizens were provided with opportunities to engage in cooperative social interactions and alignments that could bridge social, cultural, and economic cleavages. Good governance, for one, was a fertile ground for commercial growth in the form of marketplace economies that provided new opportunities and increased living standards for buyers and sellers irrespective of wealth, patrimony, or rural-urban setting. Marketplace economies grew alongside other institutional outcomes, including open recruitment to positions of governing authority, which provided entirely new pathways to social mobility for the public. Well-organized and more livable cities, which were easy to navigate, also enhanced possibilities for commingling, cooperative interactions, and bridged social alignments weakening the likelihood of antagonism between different groups.

The collective action theory is an action-oriented framework that focuses on the idea that diverse webs of cooperative action in society are engendered by the palpable social actions of persons who want to realize collective benefits. In relation to leadership, this requires a display of commitment to carrying out the necessary and often challenging work of good governance.

Patterns of Stability and Collapse: Three Counterintuitive Discoveries

To confirm that premodern governments could, in some respects, display features that we associate with contemporary democracy was itself a surprise, but we discovered other unanticipated aspects of premodern governance:

Endurability: Despite the obvious advantages in cases where we see a focus on mutual benefit and good governance, their focal periods (the period when a particular set of policies and principles remained stable) were only slightly longer, at 166 years on average, compared to the more autocratic polities with focal periods of 152 years, a difference that is not statistically significant. In addition, polities built more strongly around mutual benefit occurred relatively infrequently (only 27 percent of our sample had consistently high scores for good governance). This shows that despite the advantages of mutual benefit and good governance, they have been difficult to build and sustain in the long run.

Collapse Patterns: Further, while providing many more benefits to their citizens compared to autocratic polities, states that organized to achieve good governance also had more of a collapse pattern than polities that scored lower on good governance. That pattern includes the emergence of damaging factional struggles for power, the loss of fiscal viability of the state, and even food shortages and demographic decline.

Collapse in the case of autocracies brought less serious consequences because, lacking much in the way of governance, groups such as neighborhoods, ethnic groups, and rural communities were already organized at the local level to respond to hazards. Yet, this fragmented form of adaptation was itself problematic, precluding coordinated responses to, for example, urban fires, lawlessness, or the actions of wealthy entrepreneurs who, lacking any opposition from a well-organized authority, were in a position to distort fair marketplace pricing.

Initiating Collapse: Earlier we mentioned the separation of religion and state because, although violating its premise was not the only misstep exhibited by the respective leaderships, it was among the most damaging. In Ming China, collapse followed the actions of leaders of the mid-16th century, including the Chia-ching Emperor, who became so obsessed with Daoist ceremonies and alchemy that he neglected his duties; his successor, the Wanli Emperor, turned his attention to gaining personal wealth, a violation of long-standing prohibitions. In the case of the Mughals, the fourth emperor, convinced by Muslim leaders, abandoned religious neutrality, even taxing Hindus more than Muslims and permitting the destruction of new temples. The Roman Emperor Commodus lacked interest in governing and became an avid performer as a gladiator. He identified himself with the god Hercules. Following his failed reign, the empire devolved into a chaotic and corrupt system in which, as the historian Ramsay MacMullen concluded, “relationships involving anything other than the wish for material possession had no chance to develop.”

The case of Venice is particularly troubling in light of what has transpired in recent years in the U.S. Although the Venetian government possessed the institutional capacity to impeach leaders, when Doge Giovanni Cornaro and his family broke the religious neutrality and other rules, for example, as a result of his son accepting the position of Bishop of Bergamo, the governing council refused to impeach him. This action, regarded by many inside and outside of the government as a violation of long-standing rules, was not corrected, and the governing council’s response to criticism was to double down on its authority. These moves, according to the historian John Norwich made the council ever more unpopular both with the citizens and other organs of government and precipitated a rapid unwinding of the societal threads that had, for centuries, underpinned inclusive forms of cooperation and devotion to a governing system that aimed to realize the common good.

It is important to note that these polities had developed the governing capacity to productively address various expressions of social malfeasance, including administrative corruption and shirking and free riding among citizens that could challenge the confidence of people in each other and the government. Yet, when it was the leadership that turned away from meeting expectations—including diligence in sustaining a system of governance and maintaining its religious neutrality—all the governments in question illustrated a key vulnerability: they lacked the institutional capacity to punish leadership displaying self-serving acts contrary to the pursuit of societal benefit.

Moral Collapse and Its Relevance to Contemporary U.S. Politics

Like the societies we have discussed, the original charters of the U.S. government featured mutual moral obligations between governing authorities and citizens at their core and specified key governing precepts, including the rule of law, the peaceful transfer of power, inclusion, checks and balances on the concentration of power, and the separation of church and state. Over more than two centuries, these principles, although sometimes opposed, have largely been followed. But now they face serious challenges from the presumptive leadership of the Republican Party and influential governing bodies including the Supreme Court.

These challengers reject the notions of inclusiveness and lawfulness embedded in the original charters in a way that does not align with what the majority of American citizens believe and would like to preserve. In particular, challengers deviate from broad sensibilities both when they show strong support for the idea that white nationalist ideologies and religious fundamentalism should serve as the religious foundation for our governing practices and principles, and when they assert their belief that violence is an acceptable means to achieve political goals in the face of opposition.

We hope that our discussion of historical cases is a reminder that mutual benefit and good governance succeed or fail based on the choices of contingently cooperative citizens. Contingency implies that, as in Venice and the other cases we pointed out, the loss of citizen confidence in the leadership can trigger an unexpected unwinding of the societal threads that underpin inclusive forms of cooperation and devotion to a governing system designed to realize common good.

Cover Photo, Top Left: Ruins of the Temple of Jupiter of the ancient Roman Empire. djedj, Pixabay

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This article was produced by Human Bridges.

What a submerged ancient bridge discovered in a Spanish cave reveals about early human settlement

UNIVERSITY OF SOUTH FLORIDA—TAMPA, Fla. (Aug. 27, 2024) A new study led by the University of South Florida has shed light on the human colonization of the western Mediterranean, revealing that humans settled there much earlier than previously believed. This research, detailed in a recent issue of the journal, Communications Earth & Environment, challenges long-held assumptions and narrows the gap between the settlement timelines of islands throughout the Mediterranean region.

Reconstructing early human colonization on Mediterranean islands is challenging due to limited archaeological evidence. By studying a 25-foot submerged bridge, an interdisciplinary research team – led by USF geology Professor Bogdan Onac – was able to provide compelling evidence of earlier human activity inside Genovesa Cave, located in the Spanish island of Mallorca.

“The presence of this submerged bridge and other artifacts indicates a sophisticated level of activity, implying that early settlers recognized the cave’s water resources and strategically built infrastructure to navigate it,” Onac said.

The cave, located near Mallorca’s coast, has passages now flooded due to rising sea levels, with distinct calcite encrustations forming during periods of high sea level. These formations, along with a light-colored band on the submerged bridge, serve as proxies for precisely tracking historical sea-level changes and dating the bridge’s construction.

Mallorca, despite being the sixth largest island in the Mediterranean, was among the last to be colonized. Previous research suggested human presence as far back as 9,000 years, but inconsistencies and poor preservation of the radiocarbon dated material, such as nearby bones and pottery, led to doubts about these findings. Newer studies have used charcoal, ash and bones found on the island to create a timeline of human settlement about 4,400 years ago. This aligns the timeline of human presence with significant environmental events, such as the extinction of the goat-antelope genus Myotragus balearicus.

By analyzing overgrowths of minerals on the bridge and the elevation of a coloration band on the bridge, Onac and the team discovered the bridge was constructed nearly 6,000 years ago, more than two-thousand years older than the previous estimation – narrowing the timeline gap between eastern and western Mediterranean settlements.

“This research underscores the importance of interdisciplinary collaboration in uncovering historical truths and advancing our understanding of human history,” Onac said.

This study was supported by several National Science Foundation grants and involved extensive fieldwork, including underwater exploration and precise dating techniques. Onac will continue exploring cave systems, some of which have deposits that formed millions of years ago, so he can identify preindustrial sea levels and examine the impact of modern greenhouse warming on sea-level rise.

This research was done in collaboration with Harvard University, the University of New Mexico and the University of Balearic Islands.

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About the University of South Florida

The University of South Florida, a high-impact research university dedicated to student success and committed to community engagement, generates an annual economic impact of more than $6 billion. With campuses in Tampa, St. Petersburg and Sarasota-Manatee, USF serves approximately 50,000 students who represent nearly 150 different countries. U.S. News & World Report has ranked USF as one of the nation’s top 50 public universities for five consecutive years, and this year USF earned its highest ranking ever among all universities public or private. In 2023, USF became the first public university in Florida in nearly 40 years to be invited to join the Association of American Universities, a prestigious group of the leading universities in the United States and Canada. Through hundreds of millions of dollars in research activity each year and as one of the top universities in the world for securing new patents, USF is a leader in solving global problems and improving lives. USF is a member of the American Athletic Conference. Learn more at www.usf.edu.

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View of the submerged stone bridge from Genovesa Cave, Mallorca, Spain. R. Landreth

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Close-up view of the submerged stone bridge from Genovesa Cave, Mallorca, Spain. R. Landreth

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Phreatic overgrowths on speleothems grow exactly at sea level, pictured above the diver in the Galeria de les Delícies in Drac Cave, Mallorca, Spain, offering a more accurate reconstruction of past sea level history. Note the submerged stalagmites that grew when sea level was much lower. M.À. Perelló

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Stone path connecting the entrance in Genovesa Cave, Mallorca, Spain, and its subterranean lake across which the bridge was constructed. B. Onac

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Article Source: University of South Florida news release.

Among Viking societies, Norway was much more violent than Denmark

UNIVERSITY OF SOUTH FLORIDA—TAMPA, Fla. (Aug. 28, 2024) Rates of violence in Viking Age Norway and Denmark were long believed to be comparable. A team of researchers including University of South Florida sociologist David Jacobson challenges that assumption.

Their findings* show that interpersonal violence – violence not meted out as punishment by authorities — was much more common in Norway. This is evident in the much greater rates of trauma on skeletons and the extent of weaponry in Norway. The study, published in the Journal of Anthropological Archaeology, sheds new light on how Viking Age societies in Norway and Denmark differed in their experiences with violence and the role social structures played in shaping those patterns.

Jacobson is part of an interdisciplinary team that combined archaeology and sociology along with the study of skeletons and of runestones – raised stones bearing inscriptions – to reveal key differences in how violence, social hierarchies and authority influenced these dynamics in the two regions. The other scholars on the team are from Norway and Germany.

“The interdiscipilinary approach taken in this study shows us how social and political patterns can be revealed, even when there are a paucity of written sources,” Jacobson said.

Norway: A More Violent Society?

Researchers analyzed skeletal remains from Viking Age Norway and Denmark and found that 33% of the Norwegian skeletons showed healed injuries, indicating that violent encounters weren’t uncommon. By comparison, 37% of the skeletons showed signs of lethal trauma, highlighting the frequent and often fatal use of weapons in Norway.

A notable feature in Norway was the presence of weapons, particularly swords, alongside skeletons in graves. The study identified more than 3,000 swords from the Late Iron Age and Viking periods in Norway, with just a few dozen in Denmark. These findings suggest weapons played a significant role in Norwegian Viking identity and social status – further emphasizing the culture’s connection to violence.

Denmark: Steeper Social Hierarchies and Controlled Violence

In Denmark, the findings show a different pattern. Danish society was more centralized, with clearer social hierarchies and stronger central authority. Violence was more organized and controlled, often linked to official executions rather than acts of personal violence.

For example, skeletal remains in Denmark showed fewer signs of weapon-related injuries but included evidence of executions such as decapitations. Skeletal evidence suggests about 6% of Viking Danes died violently, almost all from executions.

Denmark’s more structured society also had a smaller percentage of graves containing weapons than Norway’s. Instead, social order was maintained through political control, reflected in the construction of large earthworks and fortifications. These monumental structures, particularly during the reign of King Harald Bluetooth in the 10th century, demonstrated Denmark’s greater capacity for coordinated labor and more organized social hierarchies.

Why the Differences?

The study suggests that Denmark’s more rigid social structure meant that violence was less frequent but more systematically enforced through official channels, such as executions. Meanwhile, Norway’s more decentralized society experienced more peer-to-peer violence, as indicated by the higher levels of trauma found in skeletons.

The findings also support the broader theory that stronger authority and steeper social hierarchies can reduce the overall levels of violence in a society by centralizing the use of force under official control.

“The findings of these patterns suggest that we are talking of distinct societies in the regions of Norway and Denmark,” Jacobson said. “This is quite striking, as the assumption has been that socially Viking Scandanavia was largely a singular space.”

Broader Implications

The research contributes to a growing body of work that explores how social structures influenced violence in historical societies. Similar patterns have been observed in other parts of the world, such as the Andes region of South America and in areas of North America, where less centralized societies also experienced higher levels of violence.

Jacobson said he hopes the study “is a step towards a new explanatory model, especially when written sources from the period are partial or even nonexistent.”

Note: Scholars from the University of Oslo, Deutscher Verband für Archäologie in Germany and the Norwegian University of Science and Technology also were part of the research team.

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About the University of South Florida 

The University of South Florida, a high-impact research university dedicated to student success and committed to community engagement, generates an annual economic impact of more than $6 billion. With campuses in Tampa, St. Petersburg and Sarasota-Manatee, USF serves approximately 50,000 students who represent nearly 150 different countries. U.S. News & World Report has ranked USF as one of the nation’s top 50 public universities for five consecutive years, and this year USF earned its highest ranking ever among all universities public or private. In 2023, USF became the first public university in Florida in nearly 40 years to be invited to join the Association of American Universities, a prestigious group of the leading universities in the United States and Canada. Through hundreds of millions of dollars in research activity each year and as one of the top universities in the world for securing new patents, USF is a leader in solving global problems and improving lives. USF is a member of the American Athletic Conference. Learn more at www.usf.edu.

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From the Viking skeletal study: A skull displaying blunt force trauma with radiating lines. Lisa Mariann Strand

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From the Viking skeletal study: Antemortem damage is observable with remodeling of the occipital bone. Lisa Mariann Strand

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From the Viking skeletal study: Weapon related lesions identified on sacrum side and tibia. Lisa Mariann Strand

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Article Source: UNIVERSITY OF SOUTH FLORIDA news release.

What role did fear play in Europe’s population growth?

COMPLEXITY SCIENCE HUB—[Vienna, August 26 2024] – Since the end of the last Ice Age, growth of human population was far from uniform, marked instead by periods of rapid expansion followed by sharp declines. The reasons behind these fluctuations remain only partially understood. Previous research by CSH scientists Peter TurchinDaniel Kondor, and an international team of collaborators, demonstrated that social conflicts, rather than – or in addition to – environmental factors, could have significantly impacted these patterns. Now, they add another piece to the puzzle.

Wars and conflicts not only cause direct casualties but also create an atmosphere of distress and fear. This fear, by affecting where and how people settle, could have influenced substantially how the population in Europe developed, as shown in a study published in the Journal of the Royal Society Interface.

Flight And Overpopulation

“Globally, scientists have extensively studied and debated the presence and role of conflicts in prehistory. However, estimating their effects, such as those on population numbers is still difficult,” explains Daniel Kondor from CSH. “This is even more complicated by potential indirect effects, like people who, out of fear, leave their homes or avoid certain areas.”

These indirect impacts of conflict could have caused significant, long-term population fluctuations in non-state societies, such as in Neolithic Europe (circa 7,000 BC to 3,000 BC), according to the study’s findings. “Our model shows that fear of conflict led to population declines in potentially dangerous areas. As a result, people concentrated in safer locations, such as hilltops, where overpopulation could lead to higher mortality and lower fertility,” Kondor explains. 

Matching Archaeological Evidence

The ongoing threat would prevent the settlement of much of the remaining land. Co-author Detlef Gronenborn from the Leibniz Centre for Archaeology (LEIZA) in Mainz, Germany, adds: “The results from the simulation studies nicely match empirical evidence from archaeological field work, like for instance the Late Neolithic site of Kapellenberg near Frankfurt, dating to around 3700 BCE. Like there, we have many instances of a temporal abandonment of open agricultural land, associated with a retreat of groups to well-defendable locations and considerable investments in large-scale defense systems like ramparts, palisades and ditches.”

“This concentration of people in specific, often well-defended locations could have led to increasing wealth disparities and political structures that justified these differences,” adds Peter Turchin from CSH. “In that way, indirect effects of conflict might have also played a crucial role in the emergence of larger political units and the rise of early states.”

Complexity Science Meets Archaeology

To simulate population dynamics in Neolithic Europe, the researchers developed a computational model. To test the model, they utilized a database  of archaeological sites, analyzing the number of radiocarbon age-measurements from various locations and time periods, under the assumption that this reflects the scale of human activities, and thus, ultimately, population numbers. “This allows us to examine the typical amplitudes and timescales of population growth and decline across Europe,” Kondor explains. “Our goal was for our simulation to reflect these patterns.”

In the future, the model could help interpret archaeological evidence, such as signs of overpopulation or land use patterns, which in turn can provide necessary context and data for further refinements to modeling. This is a typical example of interdisciplinary collaboration that CSH aims to foster. “Using complexity science methods, we develop mathematical models to analyze the rise and fall of complex societies and identify common factors,” Turchin explains. This involves collecting vast amounts of historical data, managed in specialized databases like the Seshat Global History Databank. “For the most complete picture possible, direct collaboration with archaeologists is immensely important. This study is a great example of the potential that such interdisciplinary collaboration can have,” Kondor emphasizes.

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About CSH

The Complexity Science Hub (CSH) is Europe’s research center for the study of complex systems. We derive meaning from data from a range of disciplines – economics, medicine, ecology, and the social sciences – as a basis for actionable solutions for a better world. Established in 2015, we have grown to over 70 researchers, driven by the increasing demand to gain a genuine understanding of the networks that underlie society, from healthcare to supply chains. Through our complexity science approaches linking physics, mathematics, and computational modeling with data and network science, we develop the capacity to address today’s and tomorrow’s challenges.

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Visualisation of situation around 3700 BCE. Magistrat der Stadt Hofheim; LEIZA-Leibniz-Zentrum für Archäologie, Architectura Virtualis 2020 www.leiza.de/kapellenberg

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Article Source: COMPLEXITY SCIENCE HUB news release.

Wood charcoal reveals the existence of a variety of woody plants around early millet sites and people started pruning, protecting and managing Prunus fruit trees as early as 8000 yr BP.

SCIENCE CHINA PRESS—This study* is led by Hui Shen, Keliang Zhao, Xinying Zhou, Xiaoqiang Li from the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, and Zhenwei Qiu from National Museum of China. The researchers have reconstructed how early millet farmers explored and shaped local woody plants, and the protection and management of Prunus fruit trees to acquire more food resources since 8000 yr BP.

Early evidence of wheat and cotton in Nigeria

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES—Archaeological wheat and cotton remains reveal sophisticated trade networks and agricultural experimentation in Medieval West Africa, according to a study. Free-threshing wheat (Triticum aestivum and Triticum durum) and old-world cottons (Gossypium arboreum and Gossypium herbaceum) were introduced to West Africa as part of Trans-Saharan trade networks. Previous research on wheat and cotton in the region has been limited to arid sites associated with the arrival of Islamic merchants. Amanda Logan and colleagues analyzed archaeological wheat and cotton remains from the major Medieval urban center of Ilé-Ifè, Nigeria, located in a humid tropical forest. Analysis of 353 charred cotton seeds and seed coat fragments revealed that fiber was probably cultivated and manufactured into cloth locally. Two directly dated cotton seeds yielded dates of around 1201–1224 CE, which is roughly contemporaneous with cotton remains from arid sites further north. The authors identified 48 well-preserved grains of free-threshing wheat at the site and dated four grains to 1294–1397 CE. Wheat was likely imported to the site, given that the humid forest environment is not suitable for local cultivation. The authors suggest that cotton cloth and wheat likely represented luxury goods in the region. According to the authors, the rapid adoption of cotton illustrates a highly developed trade in commodity crops across Africa, centuries before cotton became central to European global trade.

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Profile of deep pit where wheat was found at Oduduwa College in Ilé-Ifè, Nigeria. Gérard Chouin, Ife-Sungbo Archeological Project

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Article Source: PNAS news release.

*“Early archaeological evidence of wheat and cotton from medieval Ile-Ife, Nigeria” by Amanda L. Logan et al., PNAS, 26-Aug-2024. https://www.pnas.org/cgi/doi/10.1073/pnas.2403256121

Cover Image, Top Left: ammeelamz, Pixabay

To kill mammoths in the Ice Age, people used planted pikes, not throwing spears, researchers say

UNIVERSITY OF CALIFORNIA – BERKELEY—How did early humans use sharpened rocks to bring down megafauna 13,000 years ago? Did they throw spears tipped with carefully crafted, razor-sharp rocks called Clovis points? Did they surround and jab mammoths and mastadons? Or did they scavenge wounded animals, using Clovis points as a versatile tool to harvest meat and bones for food and supplies?

UC Berkeley archaeologists say the answer might be none of the above.

Instead, researchers say humans may have braced the butt of their pointed spears against the ground and angled the weapon upward in a way that would impale a charging animal. The force would have driven the spear deeper into the predator’s body, unleashing a more damaging blow than even the strongest prehistoric hunters would have been capable of on their own.

Drawing upon multiple sources of writings and artwork, a team of Berkeley archaeologists reviewed historical evidence from around the world about people hunting with planted spears. 

They also ran the first experimental study* of stone weapons that focused on pike hunting techniques, revealing how spears react to the simulated force of an approaching animal. Once the sharpened rock pierced the flesh and activated its engineered mounting system, they say, the spear tip functioned like a modern day hollow-point bullet and could inflict serious wounds to mastodons, bison and saber-toothed cats.

“This ancient Native American design was an amazing innovation in hunting strategies,” said Scott Byram, a research associate with Berkeley’s Archeological Research Facility and first-author of a paper on the topic published today in the journal PLOS ONE. “This distinctive Indigenous technology is providing a window into hunting and survival techniques used for millennia throughout much of the world.”

The historical review and experiment may help solve a puzzle that has fueled decades of debate in archaeology circles: How did communities in North America actually use Clovis points, which are among the most frequently unearthed items from the Ice Age?

Named for the town of Clovis, New Mexico, where the shaped stones were first recovered nearly a century ago, Clovis points were shaped from rocks, such as chert, flint or jasper. They range from the size of a person’s thumb to that of a midsize iPhone and have a distinct, razor-sharp edge and fluted indentations on both sides of their base. Thousands of them have been recovered across the U.S. — some have even been unearthed within preserved mammoth skeletons. 

They’ve also been a pop culture plot point. Characters in the video game “Far Cry Primal” use spears tipped with stone points to ambush mastodons. The movie 10,000 B.C. uses a similar spear to hunt mammoths. Scholars and hobbyists reconstruct Clovis points — and some even document on YouTube the process of building them and using them to hunt bison.

Those depictions make for a good story. But they likely fail to consider the realities of life in the Ice Age, said Byram and his co-author, Jun Sunseri, a Berkeley associate professor of anthropology. 

Clovis points are often the only recovered part of a spear. The intricately designed bone shafts at the end of the weapon are sometimes found, but the wood at the base of the spear and the pine pitch and lacing that help make them function as a complete system have been lost to time. 

Plus, research silos limit that kind of systems thinking about prehistoric weaponry, Jun said.  And if stone specialists aren’t experts in bone, they might not see the full picture.

“You have to look beyond the simple artifact,” he said. “One of the things that’s key here is that we’re looking at this as an engineered system that requires multiple kinds of sub-specialties within our field and other fields.”

Building tools as strong, effective systems was likely a priority for communities 13,000 years ago. The tools needed to be resilient. The people had a limited number of suitable rocks to work with while traversing the land. They might go hundreds of miles without access to the right kind of long, straight poles from which to fashion a spear. So it stands to reason they wouldn’t want to risk throwing or destroying their tools without knowing if they’d even land the animal, said Byram, who mined archival records, spanning anthropology to art to Greek history, to trace the arc of planted pikes as weapons.

“People who are doing metal military artifact analysis know all about it because it was used for stopping horses in warfare,” Byram said. “But prior to that, and in other contexts with boar hunting or bear hunting, it wasn’t very well known. It’s a theme that comes back in literature quite a bit. But for whatever reason, it hasn’t been talked about too much in anthropology.”

To evaluate their pike hypothesis, the Berkeley team built a test platform measuring the force a spear system could withstand before the point snapped and/or the shaft expanded. Their low-tech, static version of an animal attack using a braced, replica Clovis point spear allowed them to test how different spears reached their breaking points and how the expansion system responded. 

It was based on prior experiments where researchers fired stone-tipped spears into clay and ballistics gel — something that might feel like a pinprick to a 9-ton mammoth.

“The kind of energy that you can generate with the human arm is nothing like the kind of energy generated by a charging animal. It’s an order of magnitude different,” Jun said. “These spears were engineered to do what they’re doing to protect the user.”

The experiment put to the test something Byram had mulled for decades. When he was in graduate school and analyzing prehistoric stone tools, he crafted replica Clovis points and fashioned spears using traditional techniques. He remembered thinking how time-intensive a process it was to invest in a stone Clovis point — and how important it would be for the point to function effectively.

“It just started to make sense to me that it actually had a different purpose than some of the other tools,” Byram said. “Unlike some of the notched arrowheads, it was a more substantial weapon. And it was probably also used defensively.”

Conversations around a campfire early in the pandemic between Jun, a zooarchaeologist who learned from local communities during his time in Africa, and Kent Lightfoot, a Berkeley anthropology professor emeritus, prompted them to dig into the mystery. Through talks with his VhaVenda mentors, Jun learned how the engineering that went into the butt of some spears was just as critical as the work that went into the points. 

“The sophisticated Clovis technology that developed independently in North America is testimony to the ingenuity and skills that early Indigenous people employed in their cohabitation of the ancient landscape with now-extinct megafauna,” said Lightfoot, a co-author of the study.

In the coming months, the team plans to further test its theory by building something akin to a replica mammoth. Using a type of slide or pendulum, they hope to simulate what an attack might have looked like as a planted Clovis-tipped pike made impact with a massive, fast-moving mammal.   

“Sometimes in archaeology, the pieces just start fitting together like they seem to now with Clovis technology, and this puts pike hunting front and center with extinct megafauna,” Byram said. “It opens up a whole new way of looking at how people lived among these incredible animals during much of human history.”

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Clovis points are distinguishable, in part, due to their distinctive flute or channel flake scar near the base, as shown in these replicas. UC Berkeley researchers studied how the points functioned as part of a system and were used to bring down megafauna in the Ice Age. Courtesy of Scott Byram

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A high-speed photo sequence during a test after an 11.34 kg weight was dropped from 35 cm shows various moments as the stone point recedes into and splinters the pike shaft. Researchers said the way the stone point could have pierced animal flesh and the wood-and-bone shaft opened up suggests that the spear as a system functioned similar to a hollow-point bullet. Courtesy of Scott Byram

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Article Source: University of California – Berkeley news release

*Clovis points and foreshafts under braced weapon compression: Modeling Pleistocene megafauna encounters with a lithic pike, PLoS ONE, 21-Aug-2024. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0307996

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Fossil hotspots in Africa obscure a more complete picture of human evolution

GEORGE WASHINGTON UNIVERSITY—WASHINGTON (August 20, 2024) – Much of the early human fossil record originates from just a few places in Africa, where favorable geological conditions have preserved a trove of fossils used by scientists to reconstruct the story of human evolution. One of these fossil hotspots is the eastern branch of the East African Rift System, home to important fossil sites such as Oldupai Gorge in Tanzania. Yet, the eastern branch of the rift system only accounts for 1% of the surface area of Africa—a fact that makes it possible to estimate how much information scientists who rely on such small samples are missing.

In a new study* published today in the journal Nature Ecology & Evolution, researchers at the George Washington University show the extent to which the concentration of sites in hotspots like the East African Rift System biases our understanding of human evolution and why scientists must take that bias into account when interpreting early human history.

“Because the evidence of early human evolution comes from a small range of sites, it’s important to acknowledge that we don’t have a complete picture of what happened across the entire continent,” says W. Andrew Barr, an assistant professor of anthropology at GW and lead study author. “If we can point to the ways in which the fossil record is systematically biased and not a perfect representation of everything, then we can adjust our interpretations by taking this into account.”

To determine the size of the bias in the fossil record, Barr and his co-author Bernard Wood, University Professor of Human Origins at GW, looked at the distribution of modern mammals that currently live in the rift valley. They found that very few medium- and large-bodied mammals are “rift specialists,” and the rift environment, in fact, represents on average 1.6 % of the total geographic range of modern mammal species.

In a second analysis, Barr and Wood looked at how the skulls of modern primates collected in the rift valley compared with the skulls of the same primates from other parts of the continent. They found that skulls from the rift valley represented less than 50% of the total variation among primate skulls in Africa.

While the science community has long recognized that the rift represents just a small sample of where ancient humans likely lived, the researchers say previous studies have not used modern mammals as analogs for human fossils to try to quantify the magnitude of the bias. Information from modern mammals can’t tell us exactly where else, and in what type of environments, our human ancestors lived, but they can provide clues that help us better understand the environments and physical differences of ancient humans, say the authors.

We must avoid falling into the trap of coming up with what looks like a comprehensive reconstruction of the human story, when we know we don’t have all of the relevant evidence”  says Wood. “Imagine trying to capture the social and economic complexity of Washington D.C. if you only had access to information from one neighborhood. It helps if you can get a sense of how much information is missing.”

The researchers also note the need for the scientific community to look beyond the rift to identify new fossil sites and expand the geographic range of the fossil record.

“There’s a smaller number of people who work outside these traditional hotspots and do the thankless labor of trying to find fossils in these contexts that are really hard to work in, where the geology isn’t favorable for finding fossils,” says Barr, whose own work involves looking for fossils beyond the hotspots. “It’s worth doing that sort of work to make our picture of mammal and human evolution from this time period more complete.”

WATCH: Hear more from Barr on the significance of these findings in this video here.

The paper, “Spatial sampling bias influences our understanding of early hominin evolution in eastern Africa,” was published August 20, 2024 in Nature Ecology & Evolution. 

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Olduvai Gorge, a well-know hominin fossil site in the African Rift Valley. Dan Lundberg, CC-BY-SA 4.0, Wikimedia Commons

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Article Source: George Washington University news release.

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Decolonizing the past: the legacy of Minoan Archaeology

Anyone familiar with the Minoans has probably heard the term, “the first European civilization,” applied as a descriptor for this ancient society, best known historically in the popular literature as the subject of investigation by archaeologist Arthur Evans, who named the civilization after king Minos, the mythical king who reigned over the ancient Bronze Age city of Knossos on present-day Crete. And while the phrase may still hold some weight among many scholars of today, it likely also reflects the cultural and colonial mindset and disposition of the scholars and others whose lives and studies touched on the sensational discoveries that brought this advanced, early Aegean island society into the public light during the late 19th and early 20th centuries. 

Enter here PhD candidate Mnemosyne Rice, who has been intensely researching the Minoans as part of her studies in Minoan Archaeology at Trinity College, Dublin. She discusses this and other related topics in the newly released Episode 5 of the new podcast series, Aegean Connections, hosted by Dr. Ester Salgarella. In this podcast episode, entitled Decolonizing the past: the legacy of Minoan Archaeology, Rice relates that, at least in part, what we have traditionally known about the Minoans has also been about the way the material discoveries were originally and traditionally interpreted by the gentlemen scholars and others who were influenced by the environment of European Colonialism that existed at the time of their discoveries. With this knowledge and with the development of a revised understanding of the ancient Minoan people, Rice has focused her PhD thesis on the evolution and intellectual history of how the material evidence of this civilization has been presented in museums, most particularly the British Museum in London and the Ashmolean Museum in Oxford, both of which curate and present limited collections and exhibitions of the same. 

Rice also discusses the production of Linear A inscriptions (a largely undeciphered administrative script, and one of three scripts produced or used by the Minoans) as a craft, particularly on so-called non-administrative objects, such as stone vessels. She also describes and discusses her work on the project, The Many Lives of a Snake Goddess, which collects and studies the subsequent reuses of the famous Minoan Snake Goddess figure, which was first unearthed in the form of figurines at the Minoan palatial site of Knossos on Crete. 

Anyone can listen to Episode 5 for free at the podcast series, Aegean Connections.

Cover Photo, Top Left: British Museum, hulkiokantabak, Pixabay

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Technique uses dental traits instead of ancient DNA to map the spread of paleo-human populations

AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE (AAAS)—A new approach* to map the spread of humans in the Paleolithic era relies on dental features rather than traces of DNA, the latter of which so rarely found in ancient remains. Scientists validated the technique by creating demographic models based on fossilized teeth from 450 Homo sapiens specimens in Europe that lived throughout the Last Ice Age. “This opens up the exciting possibility to [investigate] archaeological time depths or regions where obtaining ancient DNA is not feasible, and where skeletal phenotypic data is the only source of information available,” Hannes Rathmann and colleagues write. Modern H. sapiens established an enduring foothold in Europe around 50 to 45 thousand years ago (kya) during the Last Ice Age. This migration coincided with the Upper Paleolithic, an age marked by sophisticated stone tool use. Yet, little is known about how Upper Paleolithic populations spread across Europe. Here, Rathmann et al. have modified an existing machine learning-based statistical framework to map European Ice Age population dynamics over time. The technique typically uses DNA to create demographic models, which researchers then compare with archaeological data. The newly adapted method instead assesses dental traits, such as the shape of tooth roots and fissure formations on dental crowns. As a test, researchers used it to catalog 20 dental features in 450 European specimens from 47 to 7 kya in age. While doing so, the model chronologically grouped specimens according to three climate periods: the Middle Pleniglacial (47 to 28 kya), the Late Pleniglacial (28 to 14.7 kya), and the Late Glacial to Early Holocene (14.7 to 7 kya). It also sorted populations into a Western group that spanned Portugal to Germany and an Eastern group that ranged from Italy to Russia. The framework developed 14 demographic models, and one – model 5 – aligned most consistently with established archaeological theories of population movement in Europe. In this scenario, Western and Eastern populations remained connected throughout the entire Middle Pleniglacial. Then, as the Late Pleniglacial began, groups in the East pushed westward, causing extinction events in West populations. As the world cooled further in the Late Pleniglacial, leading into the coldest stage of the Ice Age called the Last Glacial Maximum (LGM; 26.5 to 19 kya), East and West became geographically and genetically isolated. Once the LGM ended, migration and genetic exchange resumed.

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Article Source: AAAS news release.

*Human population dynamics in Upper Paleolithic Europe inferred from fossil dental phenotypes, Science Advances, 16-Aug-2024. www.science.org/doi/10.1126/sciadv.adn8129

Cover Image, Top Left: Tooth. LionFive, Pixabay

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Trackways of Otero

Anyone who visits White Sands National Park in south central New Mexico cannot help but marvel at the stark yet uniquely beautiful, undulating formations of white, rich gypsum crystal sand dunes that make it stand out from most any other arid landscape on the planet. It is what draws its thousands of visitors every year. It spreads over 145,762 acres or 227.8 square miles within the Tularosa Basin, a vast geologic graben that lies between the Sacramento Mountains to the east and the San Andres and Oscura Mountains to the west. White Sands is the largest of its kind anywhere on Earth, its gypsum sand depth extending as much as 30 feet and its dunes reaching a hight as much as 60 feet —  a mass of 4.1 billion metric tons. Despite its aridity, among its dunes live mammal populations of fox, rodents, coyotes, bobcats, badgers, rabbits, and porcupines; along with seven species of amphibians; reptiles, including a variety of lizards and snakes; and 220 species of birds. Cacti, desert grasses, and even some trees and shrubs pockmark the landscape — tracks of small animals can even be seen leading from plant to plant.

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Aerial view of White Sands. Wikimedia Commons, Public Domain

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But rewind backward over 12,000 years, and one sees a very different world. During the late Pleistocene, before the end of the Last Glacial Maximum (or LGM), the land here was characterized by lakes, rivers and streams. Vegetation was significantly more lush. It supported such animal species as mammoth, giant ground sloth, and dire wolves, mammals now long extinct. We know this because teams of scientists and specialists have spent years in the region surveying, excavating, and studying recovered finds that attest to this ancient reality. One of many locations in the region has revealed evidence of a great ancient inland body of water known to paleoclimatologists and paleontologists as Lake Otero, the largest of several lakes that characterized the Tularosa Basin between 36,000 and 19,000 years ago. Here, on what is today a dried up ancient lakebed known as a playa, teams of paleontologists and other specialists have revealed evidence for extinct late Pleistocene fauna such as mammoth, groundsloth, canid and felid carnivora (such as the dire wolf and the saber-toothed cat), bovids and camelids (such as ancient cattle species and ancient camels).

In January of 2020, one team of scientists uncovered something quite remarkable at a site they designated WHSA (White Sands) Locality 2 ………..

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Artist recreation of late Pleistocence landscape in present-day White Sands National Park. Wikimedia Commons, Public Domain

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An Extraordinary Trackway Exposed

It was in 2019 when a research team consisting of a core group of specialists—Dan Odess and David Bustos from the National Park Service, Kathleen Springer and Jeff Pagati from the US Geological Survey, Tommy Urban from Cornell University, and Matthew Bennet of Bournemouth University, discovered what appeared to be human footprints among those of what they knew to be extinct megafauna. Battling arid conditions and windblown sand, in January of 2020 they meticulously excavated and eventually revealed human, proboscidean (such as mammoths), and canid (such as dire wolf) footprints in all layers or levels throughout their trenching. But of particular interest were the human tracks — no less than 61 in all — showing, according to the researchers, “good anatomical definition”, meaning they exhibited good heel impressions, toe pads and longitudinal arch definition consistent with modern Homo sapiens footprints as well as human footprints documented at other Pleistocene sites across the world. Most important, the team was able to establish a controlled chronology for the footprints by dating their sediment context using radiocarbon ages of sediment samples containing macroscopic seeds of the aquatic plant Ruppia cirrhosa (from beds of ditch grass seeds) which sandwiched the relevant footprint-bearing layers. The dating sequence yielded calibrated ages from 22.86 ± 0.32 to 21.13 ± 0.25 ka.*

In other words, there may have been humans at this location 23,000 years ago, and perhaps even earlier.

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Read much more, including the latest update, in the complete premium article.

Cover Image, Top Left: Human fossil footprint tracks at the site. Courtesy Dan Flores.

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How bread dough gave rise to civilization

JOHN INNES CENTRE—A major international study* has explained how bread wheat helped to transform the ancient world on its path to becoming the iconic crop that today sustains a global population of eight billion. 

“Our findings shed new light on an iconic event in our civilization that created a new kind of agriculture and allowed humans to settle down and form societies,” said Professor Brande Wulff, a wheat researcher at KAUST (King Abdullah University of Science and Technology) and one of the lead authors of the study which appears in Nature

Professor Cristobal Uauy, a group leader at the John Innes Centre and one of authors of the study said: “This work exemplifies the importance of global collaboration and sharing of data and seeds across countries; we can achieve so much by combining resources and expertise across institutes and across international boundaries.” 

The secret of bread wheat’s success, according to the research by institutes that make up the Open Wild Wheat Consortium (OWWC), lies in the genetic diversity of a wild grass called Aegilops tauschii.   

Bread wheat is a hybrid between three wild grasses containing three genomes, (A, B and D) within one complex plant. 

Aegilops tauschii, an otherwise inconspicuous weed, provided bread wheat’s D-genome when it crossed with early cultivated pasta wheat in the Fertile Crescent sometime between eight and eleven thousand years ago.  

The chance hybridization on the banks of the southern Caspian Sea spawned an agricultural revolution. Cultivation of bread wheat rapidly spread across a wide new range of climates and soils as farmers enthusiastically adopted this dynamic new crop, with its high gluten content that creates an airier elasticated breadmaking dough. 

This rapid geographical advance has puzzled wheat researchers. There is no wild bread wheat: and the kind of hybridization event that added the new D genome to wheat’s existing A and B genomes created a genetic bottleneck, whereby the new species had a much-reduced genetic diversity compared to its surrounding wild grasses.  

This bottleneck effect coupled with the fact that wheat is an in-breeding species – meaning it is self-pollinating – would suggest that bread wheat might struggle outside its Fertile Crescent origins. So how did it become well-travelled and widely adopted across the region? 

In solving this conundrum, the international collaboration assembled a diversity panel of 493 unique accessions spanning the geographical range of Aegilops tauschii from north-western Turkey to eastern China.  

From this panel the researchers selected 46 accessions reflecting the species traits and genetic diversity, to create a Pangenome, a high-quality genetic map of Aegilops tauschii. 

Using this map, they scanned 80,000 bread wheat landraces – locally adapted varieties – held by CIMMYT and collected from around the world. 

This data showed that around 75% of the bread wheat D-genome is derived from the lineage (L2) of Aegilops tauschii which originates from the southern Caspian Sea. The remaining 25% of its genetic make-up is derived from lineages across its range.  

“This 25% influx of genetic material from other lineages of tauschii has contributed and defined the success of bread wheat,” said Professor Simon Krattinger, lead author of the study.  

“Without the genetic viability that this diversity brings, we would most likely not eat bread on the scale we do today. Otherwise, bread wheat today would be a regional crop – important to the Middle East but I doubt that it would have become globally dominant without this plasticity that enabled bread wheat to adapt.” 

A previous study by OWWC revealed the existence of a distinct lineage of Aegilops tauschii geographically restricted to present day Georgia in the Caucasus region – 500 kilometers from the Fertile Crescent. This Aegilops tauschii lineage (L3) is significant because it has provided bread wheat with the best-known gene for dough quality.  

In this study the researchers hypothesized that if this were an historic introgression, akin to a Neanderthal genetic footprint in the human genome, they would find landraces in the CIMMYT collections that had a higher proportion of it.  

Data analysis showed that CIMMYT wheat landraces collected from the Georgian region contained 7% L3 introgressions in the genome, seven times more than that of bread wheat landraces collected from the Fertile Crescent. 

“We used the L3 tauschii accessions as a guinea pig to track and trace the hybridizations using 80,000 bread wheat landraces,” said Professor Krattinger. 

“The data beautifully supports a picture where bread wheat emerges in the southern Caspian, then with migration and agricultural expansion it reached Georgia and here with gene flow and hybridizations with the peculiar, genetically distinct and geographically restricted L3 accessions it resulted in the influx of new genetic material.” 

“This is one of the novel aspects of our study and it confirms that using our new resources we can trace the dynamics of these introgressions in bread wheat.” 

In addition to solving this age-old biological mystery the new Aegilops tauschii open source Pangenome and germplasm made available by the OWWC, are being used by researchers and breeders worldwide to discover new disease resistance genes that will protect wheat crops against age-old agricultural plagues like wheat rust. They can also mine this wild grass species for climate resilient genes which can be bred into elite wheat cultivars. 

Researchers at the John Innes Centre worked closely with colleagues from KAUST using bioinformatic approaches to track levels of DNA contributed to bread wheat by the L3 lineage of Aegilops tauschii.  

Professor Uauy concluded: “The study highlights the importance of maintaining genetic resources such as the BBSRC funded Germplasm Resources Unit here at the John Innes Centre which maintains historic collections of wild grasses that can be used to breed valuable traits such as disease resistance and pest resistance into modern wheat.”  

Origin and evolution of the bread wheat D genome appears in Nature

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Aegilops tauschii – one of the wild grasses that gave rise to wheat. Ana Perera

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Article Source: JOHN INNES CENTRE news release.

Stonehenge’s Altar Stone origins reveal advanced ancient Britain

CURTIN UNIVERSITY—New research led by Curtin University has revealed Stonehenge’s monumental six-tonne Altar Stone, long believed to originate from Wales, actually hails from Scotland.

Furthermore, the findings point to the existence of unexpectedly advanced transport methods and societal organisation at the time of the stone’s arrival at its current location in southern England about 5000 years ago.

Curtin researchers studied the age and chemistry of mineral grains within fragments of the Altar Stone, which is a 50cm thick sandstone block measuring 5 x 1 metres, that sits at the centre of Stonehenge’s iconic stone circle in Wiltshire.

Lead author PhD student Anthony Clarke from the Timescales of Mineral Systems Group within Curtin’s School of Earth and Planetary Sciences said analysis of the age and chemical composition of minerals within fragments of the Altar Stone matched it with rocks from northeast Scotland, while also clearly differentiating them from Welsh bedrock.

“Our analysis found specific mineral grains in the Altar Stone are mostly between 1000 to 2000 million years old, while other minerals are around 450 million years old,” Mr Clarke said.

“This provides a distinct chemical fingerprint suggesting the stone came from rocks in the Orcadian Basin, Scotland, at least 750 kilometres away from Stonehenge.

“Given its Scottish origins, the findings raise fascinating questions, considering the technological constraints of the Neolithic era, as to how such a massive stone was transported over vast distances around 2600 BC.

“This discovery also holds personal significance for me. I grew up in the Mynydd Preseli, Wales, where some of Stonehenge’s stones came from. I first visited Stonehenge when I was one year old and now at 25, I returned from Australia to help make this scientific discovery – you could say I’ve come full circle at the stone circle.”

Study co-author Professor Chris Kirkland, also from the Timescales of Mineral Systems Group at Curtin, said the findings had significant implications for understanding ancient communities, their connections, and their transportation methods.

“Our discovery of the Altar Stone’s origins highlights a significant level of societal coordination during the Neolithic period and helps paint a fascinating picture of prehistoric Britain,” Professor Kirkland said.

“Transporting such massive cargo overland from Scotland to southern England would have been extremely challenging, indicating a likely marine shipping route along the coast of Britain.

“This implies long-distance trade networks and a higher level of societal organisation than is widely understood to have existed during the Neolithic period in Britain.”

Funded by an Australian Research Council Discovery Project, the research was performed in collaboration with Aberystwyth University, The University of Adelaide and University College London.

Co-author Professor Richard Bevins from Aberystwyth University said the findings overturned what had been thought for the past century.

“We have succeeded in working out, if you like, the age and chemical fingerprints of perhaps one of the most famous of stones in the world-renowned ancient monument,” Professor Bevins said.

“While we can now say that this iconic rock is Scottish and not Welsh, the hunt will still very much be on to pin down where exactly in the north-east of Scotland the Altar Stone came from.”

Co-author Dr Robert Ixer of the UCL Institute of Archaeology said the findings were genuinely shocking, but if plate tectonics and atomic physics were correct, then the Altar Stone is Scottish.

“The work prompts two important questions: why and exactly how was the Altar Stone transported from the very north of Scotland, a distance of more than 700 kilometres, to Stonehenge?”

Curtin Vice-Chancellor Professor Harlene Hayne said much of the research and analysis done by Mr Clarke and Professor Kirkland was undertaken at the University’s renowned John de Laeter Centre.

“This fascinating study is another example of the stellar work being undertaken by Curtin University’s Timescales of Mineral Systems Group with the John de Laeter Centre, using state-of-the-art equipment in our GeoHistory Facility that supports important minerals research,” Professor Hayne said.

“It offers specialist mass spectrometers which are used to examine the composition of materials such as rock-forming minerals, archaeological artefacts, meteorites, ceramics and even biological substances such as teeth, bones and shell.

“Ongoing investment is required to maintain cutting-edge facilities like this, which are crucial for attracting the world’s best minds. In this case, we are delighted that our outstanding research reputation and facilities led PhD student Anthony Clarke to travel 15,000 kilometres from his home in Wales to study at Curtin and make this significant finding.”

Mr Clarke said he chose Curtin for his PhD because it also offered the chance to work alongside renowned researchers, such as Professor Kirkland.

“Curtin has given us the freedom and independence to explore fascinating work, such as Stonehenge and access to the world’s most advanced equipment and expert staff means I can complete all my work there,” Mr Clarke said.

“Western Australia itself as home to the oldest minerals on Earth, is an outstanding natural laboratory. So I’m very grateful to have had the opportunity to do this research in this outstanding place.”

The full study titled ‘A Scottish Provenance for the Altar Stone of Stonehenge’ is published in the journal Nature.

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The Altar Stone at Stonehenge. Credit: English Heritage

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Article Source: Curtin University news release.

*A Scottish Provenance for the Alatar Stone of Stonehenge, Nature, 14 August, 2024.

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New interpretation of runic inscription reveals pricing in viking age

STOCKHOLM UNIVERSITY—A new interpretation of the runic inscription on the Forsa Ring (Forsaringen in Swedish), provides fresh insights into the Viking Age monetary system and represents the oldest documented value record in Scandinavia. The inscription describes how the Vikings handled fines in a flexible and practical manner. This is highlighted in research from the Department of Economic History and International Relations at Stockholm University, recently published in the Scandinavian Economic History Review.

International Space Station crew carries out first-ever archaeological survey in space

PLOS—An archaeological strategy adapted for space used daily photos to reveal how astronauts actually use areas aboard the International Space Station – and how this differs from intended uses. Justin Walsh of Chapman University, California, and colleagues present these findings* in the open-access journal PLOS ONE on August 7, 2024.

More than 270 people from 23 countries have visited the International Space Station (ISS) over more than two decades. Crew member interviews can reveal how people adapt to a novel environment—one featuring isolation, confinement, and microgravity—that is far removed from the context in which humans evolved. However, interviews may be unable to capture insights that could be captured by alternative approaches.

In order to better understand the “microsociety” of the ISS, Walsh and colleagues launched the International Space Station Archaeological Project, which applies an archaeological framework to the ISS and studies the materials used by its crew as artifacts.

For their first direct work on the space station, the team adapted a traditional archaeological strategy known as the shovel test pit, in which small pits are dug at intervals across a site to assess artifact distribution and select areas for more extensive excavation. In this case, the archaeologists asked the ISS crew to document six locations around the station, and instead of digging pits, taking daily photos of each location for 60 days in 2022.

The new article reveals findings from the first two of the six sample areas to be fully documented: one designated for equipment maintenance and another near the latrine and exercise equipment. Further analysis of photos in these areas using a novel open-source image analysis platform developed by the team revealed 5,438 instances of “artifacts” being used for varied purposes, such as writing tools, Post-It notes, and an augmented reality headset.

Cross-referencing the photos with astronaut activity reports, the researchers found that the area near the exercise equipment and latrine, while not designated for any particular purpose, had been used as storage for toiletries, resealable bags, and a rarely used computer. The equipment maintenance area was used primarily for storage, with little or no maintenance actually carried out there.

These findings demonstrate how traditional archaeological techniques can be adapted to study remote or extreme habitats. The findings could also help inform development of future space habitats.

The authors add: “The experiment is the first archaeology ever to happen off of the planet Earth. By applying a very traditional method for sampling a site to a completely new kind of archaeological context, we show how the ISS crew uses different areas of the space station in ways that diverge from designs and mission plans. Architects and planners of future space stations can learn valuable lessons from this work.”

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A sample location from the Sampling Quadrangle Assemblages Research Experiment (SQuARE), Square 03 in the starboard Maintenance Work Area of the International Space Station. An open crew berth is visible at right. The yellow dotted line indicates the boundaries of the sample area. NASA/ISSAP. Walsh et al., 2024, PLOS ONE, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

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Article Source: PLOS news release.

*Walsh JSP, Graham S, Gorman AC, Brousseau C, Abdullah S (2024) Archaeology in space: The Sampling Quadrangle Assemblages Research Experiment (SQuARE) on the International Space Station. Report 1: Squares 03 and 05. PLoS ONE 19(8): e0304229. https://doi.org/10.1371/journal.pone.0304229

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Carvings at ancient monument may be world’s oldest calendar

UNIVERSITY OF EDINBURGH—Markings on a stone pillar at a 12,000 year-old archaeological site in Turkey likely represent the world’s oldest solar calendar, created as a memorial to a devastating comet strike, experts suggest.

Smallest arm bone in human fossil record sheds light on the dawn of Homo floresiensis

GRIFFITH UNIVERSITY—A paper out today in Nature Communications reports the discovery of extremely rare early human fossils from the Indonesian island of Flores, including an astonishingly small adult limb bone.  

Lost Worlds of Arabia

To traverse across this land for more than 30 minutes, anyone would need a good hat, sturdy shoes, eye shades, a good dose of sun block lotion, and an ample portable supply of fresh water. Those are just the basics. Anything more depends on your planned time, distance and activity. 

This is, as was once also popularly described about the lunar surface, a magnificent desolation. The Great Nefud Desert spreads as an expansive oval shaped region across northern Saudi Arabia for about 70,000 square kilometers, characterized by rocky elevations of rock and sand ranging from 600 to 1,000 meters. Its face moves with shifting red sands, lifted by perpetual strong winds. Isolated red sandstone massifs pockmark the terrain, sculpted by tens of thousands of years of wind action, creating in some places an almost surreal landscape with an otherworldly feel. Summer temperatures can typically range between 30 to 54 degrees Celsius (between 85 and 120 degrees Fahrenheit). It goes without saying that vegetation is sparse, though a significant presence of ephemeral plants can be seen during ‘wet’ years. Despite the desolation here, modest communities of hyenas, jackals, wildcats, ungulates like gazelle, rodents and lizards make it their domicile.

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Today, humans live here, too. Concentrated primarily in lowland areas such as near the Hejaz Mountains, they manage and inhabit oases where dates, vegetables, barley, and fruits are grown. Indeed, an entire city of about 20,000 people —Jubbah — is completely surrounded by the Nefud. Thus in modern times, people have learned how to live and even thrive in this desert.

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Jubba as viewed from space. Public Domain, Wikimeda Commons

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Following The Water

The Nefud was not always like this. In recent years, teams of scientists have walked and camped across the region, surveying, sampling, excavating, studying and documenting sites that today present evidence of ancient lakes — in geologic parlance, lacustrine deposits — of which many date back at least several hundred thousand years. One can see the remnants of these ancient lakes by walking across the surface, and especially by viewing the surface from aerial vantage points. They have a different color and consistency from what is often a context of windblown, sandy dunes. In these places, scientists have uncovered fossils and other evidence of water-endowed spaces that, tens of thousands of years ago, were frequented or inhabited by a variety of animal and plant species — ecosystems much like the savannas of Africa we see today. By analyzing the recovered fossils, climate models and records, and the lacustrine sediment records of these ancient lake remnants, scientists have discovered that, at wetter intervals in this desert environment’s arid past, ‘greener’ conditions afforded a critical accommodation for fluctuating communities of life. 

The site of Ti’s al Ghadah in southwestern Nefud presents a perfect example of this. This site is located within an internal depression, or basin. As a 630-meter area ancient paleo-lake deposit outcrop, it has been dated to Pleistocene times and contains a rich array of fossil fauna. 

“Ti’s al Ghadah is one of the most important palaeontological sites in the Arabian Peninsula and it currently represents the only dated collection of middle Pleistocene fossil animals in this part of the world, and includes animals such as elephant, jaguar and water birds,” says Mathew Stewart of the University of South Wales, lead author of a 2019 published study/paper* on the results of taphonomic and zooarchaeological investigations at the site.** Most notably, the paper documented the discovery of stone tools spatially associated with evidence of butchery of animals dated to between 500,000 and 300,000 years ago.

The implications were enormous. There were humans here — or, more accurately, hominins —even before the emergence of our own species, Homo sapiens. Said Michael Petraglia, the Ti’s al Ghadah project principal archaeologist and paper co-author, “This makes Ti’s al Ghadah the first, early hominin-associated fossil assemblage from the Arabian Peninsula, demonstrating that our ancestors were exploiting a variety of animals as they wandered into the green interior.”

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A trench at the site of Ti’s al Ghaddah, where a large collection of animal fossils dating to approximately 500,000 years ago have been found. Photo: Palaeodeserts Project, from One Small Arabian Fingerbone, by Huw S. Groucutt, Popular Archaeology July 7, 2018.

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Who were these hominins? If not Homo sapiens, then what species? Scientists don’t know the answer to this question, but researchers have discovered other sites that have demonstrated a hominin presence in Arabia. An Nasim, a paleo-lake site in an internal basin like Ti’s al Ghadah within the Nefud, was found to contain Acheulean-type stone tools, along with other fossil fauna, dated to between 350 and 250 ka (thousand years) ago. And the list of new artifact discoveries at similar sites continues to expand, including a remarkable recent discovery at another paleo-lake site in the Nefud known as Al Wusta in 2016………

Bone 

The evidence for hominin occupation around the ancient paleo-lakes of Arabia has been evidenced primarily through stone tool artifact finds, including some proof of usage for processing animals at sites like Ti’s al Ghadah and the discovery of hominin footprints at the Alathar ancient paleolake deposit located within the western Nefud****. But Huw Groucutt, an archaeologist at the University of Oxford who has played a key role in the ongoing research on early humans in the Arabian Peninsula, tells the story of a tantalizing discovery made while investigating sites in the Nefud region:

“We made a quick visit to Al Wusta in 2014, which involved driving down steep dunes to the base of an inter-dunal depression. We noted some stone tools and interesting sediments, but it was late in the day and the sun was getting low in the sky so we did not stay long. It was clearly an interesting site, but we located dozens of interesting sites. It was a place to which we wanted to return at some point, and our team member Prof Nick Drake (Kings College London) kept mentioning the site as something that looked significant. In 2016 we returned to the site with a large interdisciplinary team of international and Saudi scholars. We walked to the far end of the site where we had not previously been, and immediately found numerous animal bones and human-made stone tools on the surface. These were scattered around deposits of lake sediments. Then our colleague, Dr Iyad Zalmout from the Saudi Geological Survey, picked up a small and well preserved fossil.” 

The find turned out to be a human intermediate phalanx (middle finger bone, the bone from the knuckle toward the end of the finger). By employing a series of chronometric dating techniques, scientists were able to determine the age to be between 95-86 thousand years old.

That made this find rare and remarkable, as it represented the only direct fossil evidence ever found of human habitation in the region as long ago as nearly 90,000 years BP.

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The Al Wusta site from the top of a neighboring sand dune. Photo: Ian Candy. From One Small Arabian Fingerbone, by Huw S. Groucutt, Popular Archaeology July 7, 2018.

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Lithic artifacts (stone tools) from Al Wusta. Top row: two Levallois flakes, bottom: Levallois core. Photo: Eleanor Scerri. From One Small Arabian Fingerbone, by Huw S. Groucutt, Popular Archaeology July 7, 2018.

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The Al-Wusta 1 intermediate phalanx fingerbone. Photo: Ian R. Cartwright. From One Small Arabian Fingerbone, by Huw S. Groucutt, Popular Archaeology July 7, 2018.

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What kind of human?

So the phalanx was human, but to what species of human did it belong? Given the age, could it be Neanderthal?

“In many cases, a single fossil would not be enough to determine the species represented,” says Groucutt. “In the case of the finger bone, however, we are lucky in that this bone is very different in Neanderthals and Homo sapiens. In basic terms, Neanderthal intermediate phalanges are relatively shorter and are generally more robust, while those of Homo sapiens are relatively longer and are more gracile. The [measurement] values for the Al Wusta finger bone clearly aligns it with Homo sapiens.”

Combined with the associated lithics, the case then became a slam-dunk for early modern humans. Many of the Al Wusta site artifacts “feature an emphasis on centripetal Levallois technology”, says Groucutt. This is a manufacturing technique typical of Middle Paleolithic/Middle Stone Age period stone tools, common among finds associated with the early modern human presence at other sites, such as in east and north Africa. 

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Above and below: Stone “hand axe” artifacts very recently discovered by an international team of archaeologists working with The Royal Commission for AlUla (RCU), directed by Dr Ömer ‘Can’ Aksoy and Dr Gizem Kahraman Aksoy of TEOS Heritage. These artifacts have been assessed on a preliminary basis as over 200,000 years old, assigning them to the Lower-Middle Palaeolithic period. Courtesy Royal Commission for AlUla (RCU) as reported in RCU news release, Giant Stone Hand Axe May Rewrite Prehistory in Saudi Arabia.

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Dispersal into Green Arabia

Luminescence dating of the sediments at the paleo-lake deposit sites indicates that the dates for the evidence of hominin occupation occurred at a time of higher rainfall in the region, when freshwater lakes, wetlands and rivers formed, inviting development of migration routes for animal species……. and hominins.

“It’s remarkable; every time it was wet, people were there,” says Petraglia from the Max Planck Institute for the Science of Human History. “This work puts Arabia on the global map for human prehistory.” As more evidence of hominin occupation in the region mounts, scientists are becoming increasingly convinced that the Arabian Peninsula was an important corridor for dispersal of hominins out of Africa into the rest of the world, occurring in different waves and at different times in prehistory. 

And the findings portend the development of a broader and more complex story on human evolution. “Arabia has long been seen as empty throughout the past,” says Groucutt. “Our work shows that we still know so little about human evolution in vast areas of the world and highlights the fact that many surprises are still out there.”

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There is much more. Read the complete article.

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‘Screaming Woman’ mummy may have died in agony 3,500 years ago

FRONTIERS—In 1935, the Metropolitan Museum of New York led an archaeological expedition to Egypt. In Deir Elbahari near Luxor, the site of ancient Thebes, they excavated the tomb of Senmut, the architect and overseer of royal works – and reputedly, lover – of the famed queen Hatschepsut (1479-1458 BCE). Beneath Senmut’s tomb, they found a separate burial chamber for his mother Hat-Nufer and other, unidentified relatives.