So I/R goes back even further than we thought.:eek: Q: Thread po-po...should I have deposited this one in the I/R thread.:dunno:
http://news.yahoo.com/sex-neanderthals-gave-humans-immunity-boost-180402452.html
Neanderthals and other extinct humans might have endowed some of us with the robust immune systems we enjoy today, scientists now find.
These genetic gifts might have helped our species as we expanded out of Africa, investigators added.
Although we modern humans are the only surviving members of our lineage, others once roamed the Earth, including familiar Neanderthals and the newfound Denisovans, who lived in what is now Siberia. Genetic analysis of fossils of these extinct lineages has revealed they once interbred with our ancestors, with recent estimates suggesting that Neanderthal DNA made up 1 percent to 4 percent of modern Eurasian genomes and Denisovan DNA made up 4 percent to 6 percent of modern Melanesian genomes.
http://news.yahoo.com/sex-neanderthals-gave-humans-immunity-boost-180402452.html