Scientists have found that Native American populations – from Canada to the southern tip of Chile – arose from at least three migrations, with the majority descended entirely from a single group of First American migrants that crossed over through Beringia, a land bridge between Asia and America that existed during the ice ages, more than 15,000 years ago.
— Read on www.ucl.ac.uk/news/2012/jul/native-american-populations-descend-three-key-migrations
