Ancient Pinkie Hints at New Human Ancestor

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A pinkie bone found in southern Siberia suggests the existence of a previously unknown human ancestor. The 30,000 years old bone belonged to a young girl who was part of a group that scientists are calling Denisovans. DNA extracted from the bone was more closely related to Neanderthals than to modern humans, and the genome shares more similarities with humans currently living in New Guinea than in Europe or Asia. [NPR]