How an Ancient Piece of Earth Rock Ended Up on The Moon amusingplanet.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from amusingplanet.com Daily Mail and Mail on Sunday newspapers.
NASA's Apollo missions already sent astronauts to the moon from 1969 to 1972. But scientists say there's still lots of good science to do there. The moon also could be an ideal stepping stone to Mars.
The Colorado River is young by geologic standards only five or six million years. But the channel it cuts through the Colorado Plateau exposes rocks that are much older. At the bottom of the Grand Canyon, river runners can spot ancient bedrock that formed nearly two billion years ago. In that vast span of time, the Earth experienced five mass extinctions. But the signs of those cataclysms are mostly hidden.