DNA indicates humans in N. America 14,300 years ago(boston.com)

5 pointsby erictobia18 ปีที่แล้ว1 comments

http://www.boston.com/news/science/articles/2008/09/21/dna_indicates_humans_in_n_america_14300_years_ago/

1 comments

echair18 ปีที่แล้ว

"The findings kill the suggestion some of the earliest Americans came from Europe."

How exactly do they do that?