Another humanoid species co-existed with early humans and Neanderthals

http://io9.com/5715516/another-humanoid-species-co+existed-with-early-humans-and-neanderthals

"The genome of the Denisovans is more diverged from modern humans than any two humans are from each other. It's almost exactly as diverged as the Neanderthal genome was. That's one of the reasons that we think the Denisovans and the Neanderthals are descendants of a single migration event into Eurasia."