Sixteen teams from around the world have set their sights on the moon... and the $30 million Google Lunar XPRIZE. The challenge - issued in 2007 - is to land a privately-funded rover on the lunar surface, travel 500 meters, and transmit back high definition video and images - all at a fraction of what a typical NASA mission costs. Faith Lapidus catches up with the German team who call themselves the "Part Time Scientists."