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Mars Global Surveyor image of Mars which suggests possible presence... News PhotoAstronomy,Color Image,Image,Planet - Space,Possible,Science and Technology,Space,Square,TIMEINCOWN,TLPConprod,WaterPhotographer Collection: The LIFE Picture Collection Time Life PicturesMars Global Surveyor image of Mars which suggests possible presence of water on planet. (Photo by Time Life Pictures/US Geological Survey/NASA/The LIFE Picture Collection/Getty Images)