Reports

Mars: Occurrence of Liquid Water

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Science  22 May 1970:
Vol. 168, Issue 3934, pp. 972-973
DOI: 10.1126/science.168.3934.972

Abstract

In the absence of juvenile liquid water, condensation of water vapor to ice and subsequent melting of ice are the only means of producing liquid water on the martian surface. However, the evaporation rate is so high that the available heat sources cannot melt pure ice. Liquid water is therefore limited to concentrated solutions of strongly deliquescent salts.