Ancient Americans arrived in a single wave, Alaskan infant's genome suggests
By Michael PriceJan. 3, 2018 , 1:00 PM
A rare smidgen of ancient DNA has sharpened the picture of one of humanity's greatest migrations. Some 15,000 to 25,000 years ago, people wandered from Asia to North America across a now-submerged land called Beringia, which once connected Siberia and Alaska. But exactly when these ancient settlers crossed and how many migrations occurred are hotly debated. Now, the oldest full genome to be sequenced from the Americas suggests that some settlers stayed in Beringia while another group headed south and formed the population from which all living Native Americans descend.
http://www.sciencemag.org/news/2018/01/ancient-americans-arrived-single-wave-alaskan-infants-genome-suggests
