Siberians share DNA with extinct human species
Researchers have found that people in East Asia share genetic material with Denisovans, who got the name from the cave in Siberia where they were first found.
The new study covers a larger part of the world than earlier research, and it is clear that it is not as simple as previously thought.
Professor Mattias Jakobsson, of Uppsala University in Sweden who conducted the study together with graduate student Pontus Skoglund, said hybridisation took place at several points in evolution and the genetic traces of this can be found in several places in the world.
He said: "We'll probably be uncovering more events like these.
"Previous studies have found two separate hybridisation events between so-called archaic humans - different from modern humans in both genetics and morphology - and the ancestors of modern humans after their emergence from Africa....