Discovery of Strange Ancient Human Bedfellow Sheds Light on Genetic Diversity
Early humans lived in a world that one evolutionary geneticist compared to the fantasy world of Lord of the Rings. Not only were there many hominid populations, but these populations interbred, contributing to the genetic diversity of modern humans.
Update: DNA has found modern humans carry Neanderthal blood.
All three fossils (two molars and part of a finger bone) were found in Denisova cave in southern Siberia, where Russian student Zoya Gudkova takes a break from digging. Neanderthals and modern humans also lived there tens of thousands of years ago.