Photo: Americas Settled 15,000 Years Ago, Study Says



The Schaefer mammoth, found in Wisconsin bearing cut marks suggesting it was butchered by humans, is thought by archaeologists to be about 14,500 years old.

The remains are part of a growing body of genetic and archaeological evidence suggesting that humans crossed the Bering land bridge about 22,000 years ago, then moved southward relatively late after melting ice cleared a path through Canada, a new study says.

Photograph courtesy D. Joyce


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