Our prehistoric human ancestors relied on deliberately modified and sharpened stone tools as early as 3.3 million years ago.

WASHINGTON – Early human ancestors during the Old Stone Age were more picky about the rocks they used for making tools than previously known, according to research published Friday. Not only did these ...

This photo provided by the Homa Peninsula Paleoanthropology Project in August 2025, shows Oldowan stone tools made from a variety of raw materials sourced more than 6 miles away from where they were ...