California Academy of Sciences
California Academy of Sciences: Human Tool Use
The Academy's Zeray Alemseged's recent discovery pushes human tool-use back over 800,000 years. [2:57]
BBC
Bbc Podcasts: Episode 2: Olduvai Stone Chopping Tool 19 Jan 2010
A simple chipped stone from the Rift Valley in Tanzania marks the emergence of modern humans. Faced with the needs to cut meat from carcasses, early humans in Africa discovered how to shape stones into cutting tools. From that one...