"These results were a great surprise to us,"

FTA:
"Native Americans may have a more complicated heritage than previously believed."

 Nearly one-third of Native American genes come from west Eurasian people linked to the Middle East and Europe, rather than entirely from East Asians as previously thought, according to a newly sequenced genome.

From National Geographic

...
Willerslev believes the discovery provides simpler and more likely explanations to long-standing controversies related to the peopling of the Americas.

News report based on research published in Nature   505,p87–91 (02 January 2014) doi:10.1038/nature12736