Stone tool discovery suggests very first humans were inventors

Pallab GhoshScience CorrespondentDavid BraunThey look like simple stones, but they were state of the art tools millions of years ago, made with great skill and precisonThe very first humans millions of years ago may have been inventors, according to a discovery in northwest Kenya.Researchers have found that the primitive humans who lived 2.75 million years ago at an archaeological site called Namorotukunan used…