World's Oldest Stone Tools Predate Humans

Source: Yahoo News - ScienceThe oldest handmade stone tools discovered yet predate any known humans and may have been wielded by an as-yet-unknown species, researchers say. The 3.3-million-year-old stone artifacts are the first direct evidence that early human ancestors may have possessed the mental abilities needed to figure out how to make razor-sharp stone tools. Ancient stone artifacts from East Africa were first uncovered at Olduvai Gorge in Tanzania in the mid-20th...