A just-reported analysis of a bone fragment found in a cave in Denisova, Siberia, says it belonged to a woman who was a Neanderthal-Denisovan hybrid.
From the article:
"An analysis of the woman’s genome, reported in this week’s issue of Nature, indicates her mother was Neanderthal and her father was Denisovan, the mysterious group of ancient humans discovered in the same Siberian cave in 2011. It is the most direct evidence yet that various ancient humans mated with each other and had offspring.
“Based on other ancient genomes, researchers already had concluded that Denisovans, Neanderthals, and modern humans interbred in ice age Europe and Asia. The genes of both archaic human species are present in many people today.”