Mystery Extinct Cavemen Were More Diverse Than Neanderthals

A mysterious extinct branch of the human family tree that once interbred with modern humans was more genetically diverse than Neanderthals, a finding that also suggests many of these early humans called Denisovans existed in what is now southern Siberia, researchers say. In 2008, scientists unearthed a finger bone and teeth in Denisova cave in Siberia's Altai Mountains that belonged to lost relatives now known as the Denisovans (dee-NEE-soh-vens). Analysis of DNA extracted from a finger bon