JAVIER TRUEBA / MSF / SCIENCE PHOTO LIBRARY JAVIER TRUEBA / MSF / SCIENCE PHOTO LIBRARY
Sima de los Huesos fossils. Researchers with a display of fossil bones of Homo heidelbergensis from the Sima de los Huesos (Pit of Bones) site, Sierra de Atapuerca, Spain. This is a UNESCO World Heritage Site, containing the earliest human remains found in Europe. Homo heidelbergensis (Heidelberg Man) is a extinct hominin species from the same genus as modern humans. Like other early humans, they had complex social structures and lived in family groups. They lived around 600,000 to 400,000 years ago. Excavations in the 1990s uncovered thousands of fossil bones.
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