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29 May 2005 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a surface in the south polar region, covered by carbon dioxide frost. In this springtime scene, the frost has begun to sublime or change character so that sandy surfaces exhibit an abundance of dark spots. The circular depression is probably the remains of an impact crater. In summer, the spotted surfaces in this image would be darker than their surroundings, because they are patches of windblown sand.
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