The Director of the British Museum, Neil MacGregor, retells two million years of history of human development through the objects it has produced. This programme follows early humans as they slowly begin to move beyond their African homeland taking with them one essential item - a handaxe.In the presence of the most widely used tool humans have created, Neil sees just how vital to our evolution this sharp, ingenious implement was and how it allowed the spread of humans across the globe.Today Neil MacGregor tells the story of the handaxe, with contributions from designer Sir James Dyson and archaeologist Nick Ashton