The Sima de los Huesos hominin, previously thought to belong to an ancient human species known as Homo heidelbergensis, is now reported to be an early member of the Neanderthal lineage. Sima de los Huesos hominins lived in what is now Spain about 400,000 years ago. Image credit: © Kennis & Kennis / Madrid Scientific Films. 500,000 to 400,000 years ago (Middle Pleistocene), archaic humans split off from other groups of that period living in Africa...
