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54m 41s

Are We Alone?

Stephen Hawking sets three volunteers a series of fun challenges to show them how to think like a genius – and find out how likely it is that aliens exist.

54m 40s

Can We Time Travel?

World-famous scientist Stephen Hawking sets three ordinary people a series of mind-blowing challenges. Can they think like a genius? Can they work out if time travel is possible?

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