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Photos of the Week

Surface of Mars

The surface of Mars inside Gale's Crater is shown as NASA's Mars rover Curiosity drives toward a flat rock with pale veins that may hold clues to a wet history. If the rock meets rover engineers' approval, it will become the first to be drilled for a sample during the Mars Science Laboratory mission. Image released January 15, 2013. (REUTERS/NASA/JPL-Caltech/MSSS)

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