Researchers have debated the timing and pace of the human colonization of the Americas, though it seems clear that a migration of Paleoindians into northeast Asia came first. The record of sites in this region should thus form a basis forrnevaluating the subsequent crossing into Alaska. Hamilton and Buchanan synthesize radiocarbon dates from nearly 150 sites across northern Eurasia and Alaska, ranging in age from about 45,000 to 11,000 years, and infer the expansion dynamics of modern humans into Alaska as well as Japan and Korea.
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