Hominids may have been cutting-edge tool makers 2.6 million years ago

Contested finds point to a sharp shift in toolmaking by early members of the Homo genus

Ethiopia archaeological site

TOOL TIME  Researchers study sediments in Ethiopia where sharp-edged stone tools dating to around 2.6 million years ago were found. Rocks placed over excavated areas protected fragile sediment.

Erin Dimaggio

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