Mission to Mars (Horizon) asks can life survive on the red planet? Due to land in August 2012, NASA's Curiosity Rover is intended to answer the big question about Mars - is it a suitable environment for life? The biggest and most powerful machine ever sent to Mars, Curiosity is a mobile lab packed with diverse scientific equipment and the information it uncovers could change the way we think about the iconic red planet forever. But before Curiosity can begin its mission of discovery, it must first pass the biggest test of all - landing safely on the Martian surface. By 2010, 38 attempts had been made to reach the planet. Only 19 had succeeded. Mission to Mars (Horizon) tells the story of this unique journey of scientific discovery. Mission to Mars (Horizon) is a BBC science documentary which investigates whether life can really exist on Mars.