Dr Alice Roberts travels the globe to discover the incredible story of how humans left Africa to colonise the world - overcoming hostile terrain, extreme weather and other species of human. She pieces together precious fragments of bone, stone and new DNA evidence and discovers how this incredible journey changed our African ancestors into the people we are today.This week, Alice travels to Africa in search of the birthplace of the first people. They were so few in number and so vulnerable that today they'd probably be considered an endangered species. So what allowed them to survive at all? The Bushmen of the Kalahari have some answers: the unique design of the human body made us efficient hunters; and the ancient 'click language' of the Bushmen points to an early ability to organise and plan.So we survived here - but Africa was to all intents and purposes a sealed continent. So how and by what route did our ancestors make it out of Africa? Astonishing genetic evidence reveals that everyone alive today who isn't African descends from just one successful, tiny group which left the continent in a single crossing. An event that may have happened around 70 thousand years ago. But how did they do it? Alice goes searching for clues in the remote Arabian Desert.Directed and Produced by David Stewart
Series Producer - Paul Bradshaw
Executive Producer - Kim Shillinglaw
http://www.bbc.co.uk/programmes/b00klf6j
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