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Photos: Saturn geyser flyby, moon rings, and Mars

March 11, 2008 8:06 AM PDT
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The High Resolution Imaging Experiment camera on NASA's Mars Reconnaissance Orbiter has found evidence of a once-habitable ancient lake on Mars. At a place called the Holden Crater, scientists found exposed lake deposits and ancient megabreccia--large rock fragments embedded in a matrix of sand or clay--which contain minerals that indicate the presence of water. And where there's water, there could be life.

Photo by NASA/JPL/University of Arizona

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