 The find consists of a single bone fragment about 2 cm long that was unearthed in 2012 by Russian archeologists at the Denisova Cave, from layer 12 of the East Gallery.The cave is located in Denisova valley, Altai Mountains at Siberia, Russia.At the time, the origin (species) of the bone fragment was unknown, and it was archived along with other 2,000 non-descript bone fragments from the cave for later identification.