Discovery of jaw sheds light on early human ancestor

The earliest evidence of our human genus--Homo--was found in Ethiopia by a team of scientists and students during field research in 2013. The fossil, the left side of a lower jaw with five teeth, has been dated to 2.8 million years ago, which predates the previously known fossils of the Homo lineage by approximately 400,000 years.

Provided by Arizona State University

Runtime: 3:49

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