Can't Break 15,000 Year Mark

of the first peoples. Indigenous north Americans.

Probably because they're not that haplogroup.  So, the 'scientist' offer a huge projection based on genetic archeology.  Not sure how scientific they are...but most who insist on this theory are always proven wrong by haplogroup x.  Insisting, no matter how much spent, on falsehoods is usually proven wrong by science.  Ya, its like global warming.....

http://mobile.the-scientist.com/article/44355/ancient-dna-sheds-light-on-peopling-of-americas