A recent discovery in Africa sheds light on our species ability to make and use tools.
Further Reading:
-http://online.wsj.com/article/SB10001424127887323894704578105004000070778.html?mod=googlenews_wsj
Further Reading:
-http://online.wsj.com/article/SB10001424127887323894704578105004000070778.html?mod=googlenews_wsj