By MALCOLM RITTER 2010-08-11T17:00:57ZNEW YORK (AP) -- Two ancient animal bones from Ethiopia show signs of butchering by human ancestors, moving back the earliest evidence for the use of stone tools by about 800,000 years, researchers say.... View the full article
By MALCOLM RITTER 2010-08-11T17:00:57ZNEW YORK (AP) -- Two ancient animal bones from Ethiopia show signs of butchering by human ancestors, moving back the earliest evidence for the use of stone tools by about 800,000 years, researchers say.... View the full article