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Did Sex With Neanderthals and Denisovans Shape Our
Immune Systems? The Jury's Still Out

by Ed Yong
August 25, 2011
http://blogs.discovermagazine.com/notrocketscience/2011/08/25/did-sex-with-neanderthals-and-denisovans-shape-our-immune-systems-the-jury%E2%80%99s-still-out/

The Neanderthals may be extinct, but they live on inside
us. Last year, two landmark studies from Svante Paabo
and David Reich showed that everyone outside of Africa
can trace 1-4 percent of their genomes to Neanderthal
ancestors. On top of that, people from the Pacific
Islands of Melanesia owe 5-7 percent of their genomes to
another group of extinct humans - the Denisovans, known
only from a finger bone and a tooth. These ancient
groups stand among our ancestors, their legacy embedded
in our DNA.

Paabo and Reich's studies clearly showed that early


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