How to put a human on Mars: Exploring Mars
22 July 2013 Last updated at 15:47 BST
Prof Mark Sephton, a geologist at Imperial College London, explains why he believes humans could achieve more than robots on the surface of the Red Planet.
He heads out to a Leicestershire Quarry to illustrate what opportunities a human expedition to Mars could offer.
Thanks to Dave Gazzard and Midland Quarry Products (Hanson UK) for their help with the making of this film
Video Journalist: Neil Bowdler. Music: Spiro.