#history #archeology
"Scientists conducting a new analysis of ancient Stone Age artifacts in the Americas and Asia believe they have found evidence that the First Americans traveled from East Asia along the coast over 20,000 years ago, and not via a defrosted ‘land bridge’ connecting the two continents several millennia later.
The research team behind the potentially historic discovery believes their comparison of Paleolithic stone tools in America and Asia reveals a 'technological fingerprint' that points to a common ancestry between ancient Asian populations and the First Americans.
Although some previous studies have argued for an earlier, Upper Paleolithic American settlement, the University of Oregon team said their effort is the first to connect multiple global research sites to present a 'coherent model for the initial human occupants of the Americas.'
'This marks a paradigm shift,' said Loren Davis, professor of anthropology at Oregon State University and one of the lead authors of the study detailing the team’s findings. 'For the first time, we can say the First Americans belonged to a broader Paleolithic world—one that connects North America to Northeast Asia.'
Determining when humans first arrived in the Americas has remained a controversial topic. Most mainstream theories point to a land-based migration from the East Asian continent sometime around 13,500 years ago, when the last ice age was ending and the frozen Beringia land bridge defrosted enough to traverse.
However, several controversial discoveries in the Americas thousands of years earlier have cast doubt on that idea, including an ancient linguistic connection between the continents. For example, if the First Americans had traveled at higher latitudes across Beringia, the earliest archaeological sites should have been found in places like Alaska or the Yukon, Canada. Instead, the five primary sites studied by Davis and colleagues were in Texas, Virginia, Pennsylvania, and Idaho.
More recently, DNA analysis of ancient remains indicating Indigenous Peoples in North American continental regions that became the United States and Canada are linked to East Asian and Northern Eurasian ancestry has also hinted at a much earlier crossing. The team said this growing body of evidence is forcing researchers to consider alternative possibilities.
One competing theory gaining popularity suggests that ancient seafarers moved into the Americas from the northwestern Pacific Rim more gradually during the last glacial period, including from regions that now include Hokkaido, Japan’s northernmost island, as far back as 20,000 years ago. Although direct evidence for this theory is incomplete, the Oregon State team decided to conduct a detailed analysis of stone artefacts from Paleolithic Asia and America to detect any design similarities that would point to a shared technological tradition.
According to a press release announcing the research, the team analyzed stone tool technologies from the Americas at sites dated to 13,500 to 20,000 years ago, a period they call the American Upper Paleolithic. Among the artefacts were several stone bifaces. The researchers explained that bifaces are arrowhead-shaped stone pieces flaked on both sides to create 'durable, razor-sharp' points for hunting weapons, which 'represents a major leap in hunting technology.'
During their study, the team found that the earliest documented evidence for bifaces came from a site in Hokkaido, Japan, also dated to over 20,000 years ago. The team said these American and Asian tools 'display strong continuity with each other,' and match discoveries from several Late Upper Paleolithic sites across East Asia. They also note that this shared technological fingerprint offers compelling evidence that the biface 'advanced weapon system' was brought to the Americas as early as 20,000 years ago.
'The discovery of this archaeological connection rewrites the opening chapter of human history in the Americas,' Davis said. 'It shows that the First Americans were not cultural isolates, but participants in the same Paleolithic traditions that connected people across Eurasia and Asia.'
'This study puts the First Americans back into the global story of the Paleolithic – not as outliers – but as participants in a shared technological legacy,' the professor added.
When discussing the team’s potentially historic findings, Davis said there are similarly aged archaeological sites in Florida, Oregon, and Wisconsin that 'follow the pattern' discovered between the Asian and American sites. However, those sites contain too few artefacts to include in the current study. The research team suggests that additional evidence of this early migration is 'likely submerged' along the eastern portion of the Pacific Rim, as sea levels have risen significantly over the last 20,000 years.
Davis also notes that the earlier stone tools examined in their study were smaller and lighter than later 'Paleoindian' technologies. The latter artefacts were also made using different methods and materials. They suggest that this 'dual system of core-and-blade' production, combined with the bifacial point manufacture, forms the technological foundation from which later Paleoindian and subsequent American traditions evolved.
Davis said that this system serves as the 'technological fingerprint' linking the American Upper Paleolithic people to their roots in Northeast Asia. The researcher concedes that prior papers have suggested this technological pattern, but says his team’s 'deep dive' provides the archaeological community with 'the strongest evidence that’s been assembled to date,'
'We can now explain not only that the First Americans came from Northeast Asia, but also how they traveled, what they carried, and what ideas they brought with them,' Davis said. 'It’s a powerful reminder that migration, innovation, and cultural sharing have always been part of what it means to be human.'
The study 'Characterizing the American Upper Paleolithic' was published in Science Advances.
https://thedebrief.org/this-marks-a-paradigm-shift-study-finds-technological-fingerprint-proving-first-americans-arrived-over-20000-years-ago/