In this 2011 photo provided by Bence Viola of the University of Toronto, researchers excavate a cave for Denisovan fossils in the Altai Krai area of Russia. On Wednesday, Aug. 22, 2018, scientists reported in the journal Nature that they have found the remains of an ancient female whose mother was a Neanderthal and whose father belonged to another extinct group of human relatives known as Denisovans. (Bence Viola/Department of Anthropology - University of Toronto/Max Planck Institute for Evolutionary Anthropology via AP)
{}