How Fast Are People Moving?

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We don't have an archaeological record of boats, but we know that other peoples navigated to australia as long as 50 thousand years yet. We also know that i guess a lot of what would have been the coast is now under water, so that the archaeological record would be hard to see. What do we aeany indirect evidence, like maritime navigation or yes, we have kind of to two two pieces of evidence there. One of them is the rapidity at which people's genums diverged and moved righ.

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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