Add Yahoo as a preferred source to see more of our stories on Google. Our prehistoric human ancestors relied on deliberately modified and sharpened stone tools as early as 3.3 million years ago. The ...

Ailsa Chang speaks with David Braun, an archeologist, about his team's discovery of a site in Kenya that suggests human ancestors built tools continuously much earlier than previously thought. So when ...

Add Yahoo as a preferred source to see more of our stories on Google. A 430,000-year-old wooden tool from Greece, top, that may have been used for digging and various angles of the tool, below.

(CN) — Stone tools uncovered in central China suggest early humans there were far more inventive than scientists once believed, making complex tools tens of thousands of years earlier than expected.

Our prehistoric human ancestors relied on deliberately modified and sharpened stone tools as early as 3.3 million years ago. The selection of rock type depended on how easily the material could be ...

The earliest known hand-held wooden tools, used by our early human ancestors around 430,000 years ago, have been uncovered by researchers at an archeological site in Greece. One is made from the trunk ...