Water Evidence On Mars (Spirit Rover)

For the first time since America's twin Viking landers touched down on the Red Planet in 1976, NASA has two spacecraft working on the surface of Mars. The space agency has completed successfully five of its six attempts to land on Mars. The rover Spirit was launched from Earth on June 10, 2003, and landed on Mars on January 4, 2004, at Gusev Crater, which may be an ancient lake. Its twin, Opportunity, was launched on July 8, 2003, and landed on Mars on January 25, 2004, at Meridiani Planum, which has minerals associated with water. On March 2, 2004, NASA announced that the rovers had confirmed liquid water once flowed on Mars.