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Fossil hunters in Ethiopia are excavating a mandible, or lower jaw, of Ardipithecus ramidus. A fairly complete skeleton of this individual, nicknamed Ardi, is 4.4-million-years-old. It lived well before and was much more primitive than the 3.2-million-year-old Lucy skeleton, of the species Australopithecus afarensis. Unveiling the Ardi remains this week, scientists said this was the earliest known skeleton of a potential human ancestor.
Credit: Tim White and David L. Brill

Fossil hunters in Ethiopia are excavating a mandible, or lower jaw, of Ardipithecus ramidus. A fairly complete skeleton of this individual, nicknamed Ardi, is 4.4-million-years-old. It lived well before and was much more primitive than the 3.2-million-year-old Lucy skeleton, of the species Australopithecus afarensis. Unveiling the Ardi remains this week, scientists said this was the earliest known skeleton of a potential human ancestor.

Credit: Tim White and David L. Brill

Filed under Anthropology Archaeology Human Evolution Ardipithecus ramidus Lucy Australopithecus afarensis Ethiopia Osteology Mandible

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