SEPT. 1 (Reuters) — German scientists want to prove that space travel needn’t cost the earth — as they prepare to send a home-made rover to the moon. The challenge is to place the robot on the moon’s surface and explore at least 500 meters while transmitting high-definition video and images back to Earth, and all of that at a limited cost of 30 million dollars — a snip compared to the cheapest NASA mission […]