Gene study suggests Native Americans came from Siberia

Tue Nov 27, 2:37 AM ET

excerpt:

"Anthropologists and archeologists have long argued over whether Native Americans are descended from migrants who crossed by land to the northwest 12,000 years ago, or waves of arrivals by sea and land from elsewhere in Asia and Polynesia beginning up to 30,000 years ago."

Further reading at: http://genetics.plosjournals.org/archive/1553-7404/3/11/pdf/10.1371_journal.pgen.0030185-L.pdf