There's a new National Geographic special out, The Human Family Tree, which readers might be interested in. Next showing is on the 30th. Seems to be an extension of The Genographic Project.
Clips below the fold:
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For centuries, people have wondered about our existence. Where did we come from? How did we get to where we are today? This kind of self-reflection has founded religions and spurred the greatest achievements in science. But only recently have we had the technology to truly trace backward and…
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There is one small problem with the end of the second clip. Even after Beringia flooded contact was maintained with the old world through sea travel. In short, people kayaked and boated from Asia to America, and are still doing it today.
The New World never lost contact with the Old World, all Columbus did was broaden that contact beyond what it had been before.
A slight problem would be they mention the "mitochondrial" Eve though considering they go into the switches from "Ts to Cs" I am guessing that in the omitted material that they don't explain genetic fixation and drift. They seem to give credence to the Garden of Eden mindset and otherwise compromises with a mythology. Yes, there was an ancestral Eve and an ancestral Adam and we can see that by tracing back the respective mitochondrial genome and Y chromosome. They just never met each other.