New Scientist: A pack of private teams are racing to send robots to the Moon and claim the $20 million Google Lunar X Prize announced nearly two years ago.So far 19 teams are registered for the contest, with two more teams—Quantum3 and SCSG—having withdrawn. To win, they must land a rover on the Moon that will then drive 500 meters before turning to photograph its landing site—all before the end of 2012. The team that does it first will pick up $20 million. Second place will earn $5 million and a further $5 million in bonuses will be awarded for finding relics from past US or Soviet Moon missions such as visiting the Apollo 11 landing site.