Genome analysis suggests there was interbreeding between modern humans, Neanderthals, Denisovans and an unknown archaic population.
http://www.nature.com/news/mystery-humans-spiced-up-ancients-sex-lives-1.14196
Genome analysis suggests there was interbreeding between modern humans, Neanderthals, Denisovans and an unknown archaic population.
http://www.nature.com/news/mystery-humans-spiced-up-ancients-sex-lives-1.14196