Bbc Podcasts: Episode 3: Olduvai Handaxe 20 Jan 2010

As early humans slowly began to move beyond their African homeland, they took with them one essential item - a handaxe. It is the most widely-used tool humans have created. Neil MacGregor, Director of the British Museum, sees just how vital to our evolution this sharp, ingenious implement was and how it allowed the spread of humans across the globe. Including contributions from designer Sir James Dyson and archaeologist Nick Ashton. (Duration: 14 mins)