Article: More on the Y Chromosome and Mal'ta Boy

A priori Y chromosome phylogeny from sequencing data
http://dienekes.blogspot.com/2013/11/a-priori-y-chromosome-phylogeny-from.html

Article: Ancient European Admixture in the Americas, or Ancient Amerindian Admixture in Europe?

Ancient European admixture in the Americas, or ancient Amerindian admixture in Europe?

As I understand this article, mastodon hunters once occupied an environmental niche of steppes running from Europe to Siberia.  One group of hunters from Europe/West Asia migrated eastward to Siberia where a boy from this group was born and died.  It is primarily his DNA that is studied in the article.

The authors theorize this boy's relatives later interbred with humans whose genes are more common among East Asians.  This later, hybrid group of people -part European/West Asian and part East Asian genetically- later crossed Beringia to settle the Americas.