World's Oldest Stone Tools Predate Humans

This is an updated version of our post from April 2015. Archaeologists say they’ve unearthed the world’s oldest stone tools made by human ancestors at a dig site in Kenya. The set of 149 stone flakes, hammers and anvils, found off the shores of Lake Turkana, appears to have been crafted more than 3.3 million years ago — 500,000 years before our genus Homo, designating the first fully fledged humans, came to be. The implications, if the evidence holds up, will be far-reaching, since it