Searching for Water on Mars

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An artist's conception of NASA's Mars Science Laboratory Curiosity rover.

Scientists at NASA and CalTech are counting down to Aug. 5, when the Curiosity Rover is expected to touch down on the surface of Mars. And not just anywhere on the surface, but in one of the lowest places on the red planet -- where they hope to find evidence of water.

• More: NASA's Mars Science Laboratory - at NASA.gov
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