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Nature 410, 419-420 (22 March 2001) | doi:10.1038/35068648
Another face in our family tree
Daniel E. Lieberman
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Abstract
The evolutionary history of humans is complex and unresolved. It now looks set to be thrown into further confusion by the discovery of another species and genus, dated to 3.5 million years ago.
Until a few years ago, the evolutionary history of our species was thought to be reasonably straightforward. Only three diverse groups of hominins — species more closely related to humans than to chimpanzees — were known, namely Australopithecus, Paranthropus and Homo, the genus to which humans belong.
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