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First anatomically modern humans emerge in africa around 300 thousand years ago. They built boats and sailed to australia, and some moved into the then uninhabited americas. We piece this remarkable legacy ether using a few tools orald history, archaeology, linguistics and recently, genetics. But there is still much we don't know. A new generation of scholars is rapidly producing answers. The dawn of everything has walked into that void. Now another book has made headlines and bassello lists. It is origin, a genetic history of theAmericas. Linctoln presents.

Thousands of years ago, humans crossed a land bridge from Siberia into Alaska. They tried to move south, but a two-mile-high, coast-spanning ice wall stood between them and the rest of the continent.

How did they get past it?

Scholars have fought over that question for decades. But in her book, “Origin,” Jennifer Raff says breakthroughs in genetics have given scientists an entirely new understanding of how the Americas were peopled and what happened in the millennia that followed.

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