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Fossils like that of Australopithecus sediba, discovered in South Africa by a 9-year-old boy, are reshaping the human family tree. Photo by Brett Eloff. Courtesy Prof Berger and Wits University, CC BY-SA

Fossils like that of Australopithecus sediba, discovered in South Africa by a 9-year-old boy, are reshaping the human family tree. Photo by Brett Eloff. Courtesy Prof Berger and Wits University, CC BY-SA

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