The find was made by a team of international and local experts, at the Bokol Dara site, in northern Ethiopia. They are also demonstrating that our early ancestors may have invented stone tools separately and repeatedly before they became widespread. These artifacts are changing our understanding of the invention of tools and showing that our ancestors may have used a variety of basic technologies.
Researchers have unearthed some deliberately sharpened tools that date from over 2.5 million years ago.
