Denisovan (Neanderthal and modern man) DNA was distributed "widely" from Europe to Asia (as the evidence seems to be telling us.) And some of it seems to continue in part at present in some Asian and Oceanic locales.
The peoples with the highest concentration of Denisovan DNA are Tibetans. Apparently Denisovan DNA allows them to maintain normal o2 levels in the thinner atmosphere at high altitudes..awesome ain't it..
@Wisterious I just read an article about a new way of extracting Denisovan DNA using frozen feces, and dirt from a cave in Tibet. They've collected multiple samples, now it's off to labs to see how much viable DNA they have, and then sequence it..that's exciting..
@Wisterious may have been here with link..
Even though we LIKE to think we are ALL Homo Sapiens, purely and simply, we ARE NOT. We are a mixture of genetics going way, way back to very earliest of Primate ancestors, Mammals, single celled organisms that first evolved on this planet many many millions of years ago.
Take a full-on genetics test and see for yourself IF you don't believe me.