NotSanguine writes "Nicholas Wade of the New York Times has written an article about a new DNA study that suggests the earliest Americans arrived in three waves, not one. 'North and South America were first populated by three waves of migrants from Siberia rather than just a single migration, say researchers who have studied the whole genomes of Native Americans in South America and Canada. Some scientists assert that the Americas were peopled in one large migration from Siberia that happened about 15,000 years ago, but the new genetic research shows that this central episode was followed by at least two smaller migrations from Siberia, one by people who became the ancestors of today's Eskimos and Aleutians and another by people speaking Na-Dene, whose descendants are confined to North America.' The study, published online (paywalled), investigated geographic, linguistic and genetic diversity in native American populations."
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