March 21, 2008 9:00 AM PDT
NASA's Mars Odyssey orbiter has found evidence of salt deposits in more than 200 places in the southern hemisphere of Mars. Scientists believe that the large number of salt deposits are the leftovers of an ocean that has long-since evaporated.
Oceans point to the possible existence of life, and salt is good at preserving organic material--at least on Earth.
The bright spots on images B and C may indicate salt mineral deposits. The locations of images B and C are shown in image A.
Photo by NASA/JPL-Caltech/University of Arizona/Arizona State University/University of Hawaii
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