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Anthropology

Uncovering Ancient Human Behavior: The Secret Lives of Fossil Hands

Scientists have found new evidence for how our fossil human relatives in South Africa may have used their hands. Researchers investigated variation in finger bone morphology to determine that South African hominins not only may have had different levels of dexterity, but also different climbing abilities.

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The study of ancient human behavior has taken a fascinating turn, thanks to the discovery of new evidence that sheds light on how our fossil relatives in South Africa may have used their hands. Researchers from the American Museum of Natural History, along with colleagues from other institutions, have investigated the variation in finger bone morphology to determine that South African hominins had different levels of dexterity and climbing abilities.

The study focuses on two almost complete fossil hand skeletons found in South Africa: one belonging to Australopithecus sediba, dated to around 2 million years old, and the other from Homo naledi, discovered deep within the Rising Star Cave system and dated to around 250,000 years ago. Neither hominin has been found with stone tools, but their hand and wrist morphology suggest that they had a degree of hand dexterity more similar to humans than living chimpanzees or gorillas.

Senior author Tracy Kivell notes that it’s not surprising that A. sediba and H. naledi would be dexterous tool users, given the presence of stone tools in South Africa by at least 2.2 million years ago. However, how exactly they used tools and if they manipulated their tools in similar ways is unclear.

To address these questions, researchers investigated variation in the internal structure – the cortical bone – of the fingers in A. sediba and H. naledi. The study found that both hominins showed different functional signals in the cortical bone structure of their fingers. In A. sediba, the distribution of cortical bone within the proximal and intermediate phalanges of most of its fingers is like that of apes, but the bones of its thumb and pinky finger are more like those of humans.

Syeda concludes that these two digits are more likely to reflect potential signals of manipulation because they are less often used or experience less load during climbing or suspensory locomotion. When combined with the remarkably long human-like thumb of A. sediba, it suggests that A. sediba used its hand for both tool use and other dexterous behaviors, as well as climbing.

Homo naledi’s hands show a unique grip pattern, with a human-like signal in its proximal phalanges but an ape-like signal in its intermediate phalanges. This distinct pattern indicates that H. naledi likely used and loaded different regions of its fingers in different ways. The kind of loading pattern is typical of only certain grip types used today, like crimp grips, used often by rock climbers.

While more research is needed to further test if H. naledi may have used crimp-like grips or climbed rocks, it’s clear that throughout human evolution there were different ways of combining enhanced dexterity for tool use and food processing with the continued need to use the hands to climb, be it trees or rocks, within the South African palaeolandscape.

This work offers yet more evidence that human evolution is not a single, linear transition from upright walking to increasingly better tool use, but is rather characterized by different ‘experiments’ that balanced the need to both manipulate and to move within these past environments.

Ancient Civilizations

Unraveling a 130-Year-Old Literary Mystery: The Song of Wade Finally Solved

After baffling scholars for over a century, Cambridge researchers have reinterpreted the long-lost Song of Wade, revealing it to be a chivalric romance rather than a monster-filled myth. The twist came when “elves” in a medieval sermon were correctly identified as “wolves,” dramatically altering the legend’s tone and context.

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In this groundbreaking study, two scholars from Girton College, Cambridge, present their findings on the Humiliamini sermon, which contains the enigmatic reference to Wade. By analyzing the writing style and arguments presented in the sermon, they conclude that it was likely written by Alexander Neckam or an acolyte familiar with his work.

The sermon’s focus on humility as a lesson in the face of human vices is strikingly relevant today. The researchers highlight the use of vivid animal imagery to convey these themes, including powerful men becoming like wolves and cunning individuals imitating serpents.

Their study sheds new light on the Song of Wade, a medieval literary mystery that has puzzled scholars for over a century. By uncovering its true meaning, this research contributes significantly to our understanding of medieval literature, history, and theology.

As one scholar notes, “This sermon still resonates today… It warns that it’s us, humans, who pose the biggest threat, not monsters.” The retranslation of the Song of Wade offers a powerful reminder of the importance of humility in our daily lives.

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Ancient Civilizations

Uncovering Ancient Histories: Princeton Study Reveals 200,000 Years of Human-Neanderthal Interbreeding

For centuries, we’ve imagined Neanderthals as distant cousins — a separate species that vanished long ago. But thanks to AI-powered genetic research, scientists have revealed a far more entangled history. Modern humans and Neanderthals didn’t just cross paths; they repeatedly interbred, shared genes, and even merged populations over nearly 250,000 years. These revelations suggest that Neanderthals never truly disappeared — they were absorbed. Their legacy lives on in our DNA, reshaping our understanding of what it means to be human.

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[Image description: A sun-kissed landscape with towering trees, sparkling rivers, and vast plains stretching out to the horizon. In the foreground, a group of early humans are seen huddled around a fire, roasting meat on skewers while others are busy gathering fruits and berries from nearby bushes. Nearby, a Neanderthal individual is spotted, using a crude stone tool to scrape off flesh from a freshly hunted mammoth carcass. The two groups seem to be living in harmony, with some members of each group occasionally interacting and exchanging goods or stories.]

The Princeton study, led by Joshua Akey, has uncovered new layers of the shared history between early humans and Neanderthals. Using a genetic tool called IBDmix, the researchers mapped gene flow between the hominin groups over the past quarter-million years, revealing multiple waves of contact and interbreeding.

“We now know that for the vast majority of human history, we’ve had a history of contact between modern humans and Neanderthals,” said Akey. The results of their work were published in the journal Science, challenging previous genetic data that suggested modern humans evolved in Africa 250,000 years ago and then dispersed out of Africa 50,000 years ago.

The study found evidence of three main waves of contact: one about 200-250,000 years ago, another around 100-120,000 years ago, and the largest wave about 50-60,000 years ago. This contrasts sharply with previous research that suggested modern humans stayed put in Africa for 200,000 years before dispersing out.

The researchers also discovered that Neanderthals had a smaller population than previously thought, with estimates revised from around 3,400 individuals to roughly 2,400. This finding helps explain how Neanderthals disappeared from the fossil and genetic record around 30,000 years ago.

Akey’s team found strong evidence consistent with Fred Smith’s hypothesis that Neanderthals were largely absorbed into modern human communities rather than going extinct. “Our results provide strong genetic data consistent with Fred’s hypothesis, and I think that’s really interesting,” said Akey.

The study provides a new understanding of the complex relationship between early humans and Neanderthals, highlighting the importance of interbreeding and cultural exchange in shaping human evolution.

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Ancient Civilizations

Unraveling Ancient Mesoamerican History: The Discovery of Te K’ab Chaak’s Tomb

A major breakthrough in Maya archaeology has emerged from Caracol, Belize, where the University of Houston team uncovered the tomb of Te K’ab Chaak—Caracol’s first known ruler. Buried with elaborate jade, ceramics, and symbolic artifacts, the tomb offers unprecedented insight into early Maya royalty and their ties to the powerful Mexican city of Teotihuacan.

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The discovery of Te K’ab Chaak’s tomb, the first identifiable ruler’s tomb found in over four decades of work in Caracol, has rewritten Mesoamerican history. The tomb, located at the base of a royal family shrine, contained 11 pottery vessels, carved bone tubes, jadeite jewelry, a mosaic jadeite mask, Pacific spondylus shells, and other perishable materials.

One vessel portrayed the image of Ek Chuah, Maya god of traders, surrounded by offerings. Four of the pottery vessels depicted bound captives, similar to those found in two related burials. Two vessels supported lids with modeled handles of coatimundi (tz’uutz’ in Maya) heads.

The Chases estimate that at the time of his burial, Te K’ab Chaak was an advanced age and approximately 5’7″ in height, with no remaining teeth. Their investigations at Caracol’s Northeast Acropolis revealed three burials interred in the area, all dated to AD 350, a generation before the previously recognized Teotihuacan presence in the Maya area.

These findings demonstrate that early Maya rulers were fully enmeshed in Mesoamerican-wide contacts prior to the Teotihuacan entrada recorded on Maya monuments. The connections between the two regions were undertaken by the highest levels of society, suggesting that initial kings at various Maya cities, such as Te K’ab Chaak at Caracol, were engaged in formal diplomatic relationships with Teotihuacan.

The royal dynasty established by Te K’ab Chaak continued at Caracol for over 460 years. The Chases’ findings also indicate that ancient peoples in the new world were travelers, with a trip between Teotihuacan and Caracol today taking over 23 hours by car, or approximately 153 days on foot.

Research continues on the contents of the chamber, including the reconstruction of the jadeite death mask and ancient DNA and stable isotope analysis of the skeletal material. The Chases will present results of the 2025 Caracol field season at a conference on Maya-Teotihuacan interaction hosted by the Maya Working Group at the Santa Fe Institute in August 2025.

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