[CINC] DNA analysis shows evidence of three early Siberian migrations to New World

[David Chubb]

An international team of 64 researchers led by David Reich has published 
an article, Reconstructing Native American Population History, in the 
journal "Nature" (subscription required for access) which uses DNA 
analysis to determine that human migration from Siberia occurred in 
three waves. The authors roughly speculate on when these waves occurred, 
but additional future comparison with DNA of ancient early Asian 
populations may helps solve this riddle.

Excerpt from the Wall Street Journal:
(http://online.wsj.com/article/SB10001424052702303644004577520853902929564.html?mod=googlenews_wsj)

"Reconstructing this ancient genealogy, they found that Native Americans 
today descend from three distinct streams of genes from Asia — each the 
hereditary signature of a different ethnic group of intrepid settlers 
who began to arrive about 15,000 years ago or more. Even so, most Native 
Americans from Canada to the tip of South America owe their ancestry to 
the first of those three ancient migrations—a group of restless Ice Age 
nomads the researchers call "First American."

Also reported in Science Daily at 
http://www.sciencedaily.com/releases/2012/07/120711134710.htm