sciencehabit writes "In a report on the most complete genome of a Neandertal ever sequenced, an international team of researchers has found that the parents of a Neandertal woman from Siberia were as closely related as half-siblings. The genome also shows that at some point the Neandertals interbred with other human groups, including their cousins the Denisovans, and our own modern human ancestors. There are even signs of Denisovans interbreeding with a mysterious archaic species. In all, the study suggests very close encounters among the several kinds of hominins living in the past 125,000 years. The detailed genome of the extinct Neandertals—our closest relatives—also offers a new look at the genetic differences that set our species apart from all the others."