Add Yahoo as a preferred source to see more of our stories on Google. On January 3, 2004, NASA's Spirit rover landed on Mars! Also known as Mars Exploration Rover 2, this was the first of NASA's twin ...

(CNN) — Here’s a look at the exploration of Mars. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine successful US Mars landings: ...

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Mars exploration rover mission -- Mission impossible -- The making of the Mars rovers -- Are we really on Mars? -- Hitting the dusty trail -- Can Opportunity climb down? -- Can Spirit climb up? -- The ...

Ever lose connection to GPS? Sometimes you're in a tunnel, sometimes your phone is acting up, and sometimes you're a robotic explorer on another planet hundreds of millions of miles away from the ...