How does that relate to the possibility that all of todays Indo-Europeans originated in/around the Gansu Province region in China?
On another point. James Chatters (of Kennewick Man fame), thinks that Kennewick Man came from a line of people that spawned both todays Asians and Europeans.
I don't know about Indo-europeans being from Gansu Province. (Do you have a link for that?) Indo-european is a language family that many people seem to think originated from anywhere from central Asia to the Black Sea area. All of the sources I've read are talking about a much older population ancestral to several language famlies. Wells "The Journey of Man" dates them to 35,000BP; Cavalli-Sforza "History and Geography of Human Genes" dates them to 50,000BP+
Both place the population somewhere in central or western Asia. Sounds like Chatters is following that line of thinking.