Material World - 31/07/2008

Quentin Cooper explores the possibility of past or future life on Mars. He talks to Dr David Caitling, astrobiologist from the University of Bristol, who is involved in NASA's Phoenix Mars Lander mission, and Dr Matthew Balme from the Open University, who is using images from Mars Express to study the surface features of the red planet. Does the presence of water on the planet mean that Mars could have supported life in the past and what can this tell us about the future of our own planet?