JOHN BAVARO FINE ART / SCIENCE PHOTO LIBRARY JOHN BAVARO FINE ART / SCIENCE PHOTO LIBRARY
Illustration of a female Ardipithecus ramidus early hominid. Fossils from A. ramidus were first found in 1992 in Aramis, Ethiopia, and have been dated to around 4.4 million years ago. It was small-brained, grew to about 120 centimetres and weighed around 50 kilograms. Fossilised teeth suggest it was an omnivore. Although A. ramidus moved on all fours in the trees, when on the ground it walked upright on two legs.
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