It's the age-old question: is there life on Mars? This is the story of the Mars Exploration Rover mission, the most ambitious attempt yet to explore the surface of another planet and the first great voyage of exploration of the 21rst century. If so much as a fossilised microbe is found, it will change fundamentally the way we view our place in the universe. Squyres is the charismatic scientist behind the Mars mission. Considered the leading authority on all things Mars, he uses his firsthand knowledge to bring this historic mission in perspective. Features a 16-page photo insert.