For years, the assumption about humanity’s technological past has been that as early humans in Africa and western Europe were developing increasingly sophisticated tools, their counterparts in East Asia lagged behind, relying on simpler stone technologies until relatively late in prehistory.
However, a new archaeological discovery from central China is now challenging this long-held belief.
In research published in Nature Communications, an international team of archaeologists reports that early humans living in what is now Henan Province were making complex, carefully planned stone tools—including hafted implements attached to handles—between roughly 160,000 and 72,000 years ago.
These findings push back the timeline for technological innovation in East Asia by tens of thousands of years and suggest that advanced toolmaking was not confined to a few geographic “hotspots,” but emerged across much of the Old World during the Middle Pleistocene.
Central to this discovery is Xigou, a newly excavated site located in the Danjiangkou Reservoir region of central China. There, researchers uncovered more than 2,600 stone artifacts embedded in sediment layers securely dated using advanced luminescence techniques.
The tools, mostly made from locally available quartz and quartzite, reveal a level of technological sophistication that challenges long-standing narratives about early human behavior in Asia.
“The identification of the hafted tools provides the earliest evidence for composite tools in Eastern Asia, to our knowledge,” researchers write.
To Archaeologists, stone tools are windows into cognition, planning, and social knowledge, offering clues to how early humans thought about problems and passed skills across generations.
In Africa and western Eurasia, the later Middle Pleistocene is characterized by the emergence of prepared-core technologies, hafting, symbolic behaviors, and, eventually, personal ornaments and pigments. These innovations are often linked to increasing brain size and behavioral complexity.
By contrast, East Asia has long been portrayed as technologically conservative during this period. Many classic models suggested that complex stone technologies did not appear in the region until around 40,000 years ago, coinciding with the arrival of modern humans. However, the findings at Xigou directly undermine this view.
The tools recovered from Xigou are small—most under two inches long—but far from crude. The research team identified multiple stone-working strategies, including core-on-flake and discoid methods, which require careful planning to produce consistently sharp edges. These techniques are not accidental byproducts of breaking stone. Rather, they reflect deliberate choices made to meet specific functional needs.
More intriguing is the evidence for hafting. Hafted tools combine a stone cutting edge with a handle made from wood or other organic materials, dramatically improving efficiency and versatility. Creating such tools requires foresight, knowledge of materials, and often adhesives or bindings. All hallmarks of advanced technological systems.
At Xigou, the researchers identified stone tools with modified bases, tangs, and backing consistent with attachment to handles or shafts. Microscopic wear patterns on some pieces further support this interpretation, revealing traces left by both use and hafting.
Beyond how the tools were made, researchers also shed light on how they were used. Through detailed microwear analysis—examining microscopic scratches, polish, and fractures—the researchers found evidence that some tools were employed in boring, cutting, and scraping activities.
In several cases, the wear patterns suggest the tools were used on plant materials such as wood or reeds. One half-borer shows traces consistent with rotational motion, likely drilling into hard plant matter. Others display signs of sawing, whittling, or piercing softer materials.
These findings paint a picture of early humans engaged in a wide range of daily tasks, from crafting wooden objects to processing plant resources. The versatility of the tools suggests they were part of a broader technological toolkit designed to cope with changing environments.
The timing of the Xigou tools is significant. The period between 160,000 and 72,000 years ago coincides with growing evidence for larger-brained hominins living in East Asia. Fossil discoveries from nearby sites, such as Lingjing in central China, indicate substantial brain sizes comparable to those of early modern humans.
Researchers argue that the technological complexity seen at Xigou aligns with these biological changes. As brains grew larger and environments fluctuated—driven by glacial and interglacial cycles—human populations may have relied increasingly on flexible technologies to survive.
Climate records included in the study show that many of these innovations emerged during periods of environmental stress, when colder, drier conditions would have placed new demands on human groups. Hafted tools and diversified stone technologies may have offered critical advantages, allowing people to exploit a wider range of resources more efficiently.
Importantly, Xigou is not an isolated anomaly. Researchers situate the site within a growing body of evidence from across China showing that technological innovation was already underway well before the Upper Paleolithic. Other sites have yielded prepared-core technologies, finely retouched tools, bone implements, and even engraved objects dating back more than 100,000 years.
Taken together, these discoveries suggest that East Asia followed its own complex technological trajectory that does not fit neatly into older models borrowed from European or African archaeology.
Ultimately, the findings at Xigou suggest that technological sophistication did not radiate outward from a single origin. Rather, the evidence increasingly points to multiple regions independently developing complex solutions to shared problems. Early humans across Africa, Europe, and Asia were active experimenters, adapting tools and techniques to local environments.
The stone tools found at Xigou demonstrate that early humans in central China were not simply surviving, but engineering sophisticated technologies that required planning, skill, and accumulated knowledge.
And as archaeologists continue to uncover and reanalyze sites across Asia, the story of human innovation could become richer and far more global than once imagined.
As researchers conclude, “Though it has been repeatedly asserted that major changes in lithic technologies tended to be clustered at the Upper Palaeolithic in China, after ~40 ka, earlier records, such as the evidence from Xigou, challenge this dominant paradigm and show that hominins in China from the Middle to Late Pleistocene possessed the cognitive and technical abilities to produce complex and diversified items of material culture, compatible with their counterparts from other regions of Africa and Eurasia.”
Tim McMillan is a retired law enforcement executive, investigative reporter and co-founder of The Debrief. His writing typically focuses on defense, national security, the Intelligence Community and topics related to psychology. You can follow Tim on Twitter: @LtTimMcMillan. Tim can be reached by email: tim@thedebrief.org or through encrypted email: LtTimMcMillan@protonmail.com