Researchers have just finished performing the most comprehensive genetic analysis of modern day Africans ever. And they've turned up some absolutely incredible results.

Their findings suggest humans are more genetically diverse than we'd previously believed. But they also show that ancient humans may have interbred with an unknown species of hominin — what researchers surmise "could have been a sibling species to Neanderthals."

human populations tend to become more and more genetically similar the farther from Africa you get

[link to io9.com]