NASA - National Aeronautics and Space Administration

Artist concept of Mars Exploration Rover.
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In a giant leap for Roverkind, NASA's Mars Exploration Rover Opportunity's odometer clocked past the 10-mile mark (16,133.96 meters) on May 25 (Sol 1897).

For more information on the Mars rovers, visit their website at: http://marsrovers.nasa.gov/home/index.html