Did the First Americans Arrive via Land Bridge? This Geneticist Says No
nytimes.com
nytimes.com
"We're supposed to believe that early hominids got to northern Asia 2.1 million years ago and then for some reason didn't go any farther north," Steeves explained. "A few thousand more kilometres, they would have been in North America. So it does not make any sense whatsoever."
There is also a link to a great podcast, and she has a book out too: "The Indigenous Paleolithic of the Western Hemisphere"