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Science 22 November 1996:
Vol. 274. no. 5291, pp. 1298 - 0
DOI: 10.1126/science.274.5291.1298
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News & Comment

Ann Gibbons

A new jaw that may be the oldest fossil of our genus has been discovered in Hadar, Ethiopia. Dated at 2.3 million years old, the upper jaw gives paleoanthropologists a glimpse of a critical but mysterious time in human evolution.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)