NASA scientists have published a series of papers in the journal Science that
a soil sample scooped up by Curiosity reveals about 2% water content by weight.
Quote:
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Originally Posted by The Guardian
Aside from water, the heated soil released sulphur dioxide, carbon dioxide and oxygen as the various minerals within it were decomposed as they warmed up.
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Article in The Guardian here -
http://www.theguardian.com/science/2...ars-soil-water
Science magazine -
http://www.sciencemag.org/content/341/6153/1475