Acheulian Handaxes (IMAGE) Columbia Climate School Caption Early humans were using stone hand axes as far back as 1.8 million years ago. Credit Pierre-Jean Texier, National Center of Scientific Research, France Usage Restrictions please credit above researcher License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.