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Mars Weekly Update
Spirit's wheels have churned up light-colored soil that scientists are analyzing for clues to the environment in which it formed. Other light-colored soils have had a salty chemistry indicating the former presence of water. Spirit took this false-color image with the panoramic camera on the rover's 836th day, or sol (June 1, 2006), of exploration of Mars.
Image credit: NASA/JPL-Caltech/Cornell


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