Homo heidelbergensis tooth. This tooth has striations on its enamel left by the use of stone tools. The directions of the striations indicate that right-handedness was dominant as long as 500,000 years ago. This fossil specimen is from the Sima de los Huesos 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.
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