Mars clay, not water. Bob Zimmerman, BehindtheBlack.com
Jul 31, 2021, 01:10 AM
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Photo: This image taken by NASA’s Mars Reconnaissance Orbiter shows ice sheets at Mars’ south pole. The spacecraft detected clays nearby this ice; scientists have proposed such clays are the source of radar reflections that have been previously interpreted as liquid water.
Credit: NASA/JPL-Caltech/University of Arizona/JHU