PATRICK LANDMANN / SCIENCE PHOTO LIBRARY PATRICK LANDMANN / SCIENCE PHOTO LIBRARY
Australopithecus fossil cast. Skull cast of Australopithecus. This skull is similar to that of Little Foot, a nearly complete Australopithecus skeleton discovered by Ronald J. Clark in the Sterkfontein Caves in South Africa in 1994-1998. Australopithecus is thought to be an ancestor of humans. Photographed in 2010.
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