NASA Rover Heads to Mars NASA launches the first of two missions to Mars. Exploration Rover A, also known as Spirit, is scheduled to land in January to look for evidence that water once flowed on the Red Planet. It would be the first mission to reach Mars since July 4, 1997. Hear NPR's Joe Palca.

NASA Rover Heads to Mars

NASA Rover Heads to Mars

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NASA launches the first of two missions to Mars. Exploration Rover A, also known as Spirit, is scheduled to land in January to look for evidence that water once flowed on the Red Planet. It would be the first mission to reach Mars since July 4, 1997. Hear NPR's Joe Palca.

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