An artist's concept portrays a NASA Mars Exploration Rover on the surface of Mars.

December 15, 2003

An artist's concept portrays a NASA Mars Exploration Rover on the surface of Mars. Two rovers, Spirit and Opportunity, will reach Mars in January 2004. Each has the mobility and toolkit to function as a robotic geologist.

NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Mars Exploration Rover Project for the NASA Office of Space Science, Washington, D.C.

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