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Time to rethink how humans populated America, experts say

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Gary Tokarski
Aug 10, 2016 19:15
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Mikkel Winther Pedersen, Natural History Museum of Denmark

A new study challenges the theory that humans populated the Americas using a corridor between ice sheets more than 12,600 years ago.

After humans arrived from Siberia to Alaska via a land bridge, the route south from there was blocked by two huge ice sheets in what is now Canada, called the Cordilleran and the Laurentide.

As those ice sheets melted, a corridor opened between them, estimated to be about 930 miles long.

But the study released Wednesday uses an interesting method to demonstrate that that corridor couldn t have supported human traffic until about 12,600 years ago, even if it was physically open before that.

Scientists took samples from the materials beneath two modern bodies of water— Charlie Lake and Spring Lake in Canada— standing on the ice during the winter and drilling down.

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Gary Tokarski
Aug 10, 2016 19:15
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