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The first stone tools that ancient humans made were deceptively simple. At least 2.6 million years ago, our ancestors learned to strike stones and break off sharp flakes that could function as knives.

The latest findings suggest that separate groups of early humans invented stone tools on multiple occasions David R. Braun Members of the Homo genus have been making stone tools for at least 2.6 ...

A team of archaeologists recently applied high-tech engineering tests to stone tools, and the results suggest that even very early members of our genus, like Homo habilis, knew how to select rocks ...