[ScienceD] In saliva, clues to a 'ghost' species of ancient human

[Science Daily]

In saliva, clues to a 'ghost' species of ancient human

In saliva, scientists have found hints that a 'ghost' species of archaic humans may have contributed genetic material to ancestors of people living in sub-Saharan Africa today. The research adds to a growing body of evidence suggesting that sexual rendezvous between different archaic human species may not have been unusual.

http://feeds.sciencedaily.com/~r/science...113415.htm