NASA's twin robot geologists, the Mars Exploration Rovers, launched toward Mars on June 10 and July 7, 2003, in search of answers about the history of water on Mars. They have now both landed on Mars, Spirit on January 3 and Opportunity on January 24 PST (January 4 and January 25 UTC).
The Mars Exploration Rovers mission is part of NASA's Mars Exploration Program, a long-term effort of robotic exploration of the red planet.
Both Mars rovers are now sending back some fantastic pictures of the Martian surface. Check out these early Mars pictures from the Mars Rovers.
