A “Lake Superior”-sized body of underground ice, and that “represents less than one percent of all known water ice…

A “Lake Superior”-sized body of underground ice, and that “represents less than one percent of all known water ice on Mars”! It’s protected from evaporation (actually sublimation) by a layer of soil. The ice is not pure water, but is mixed with a fair bit of soil/dust/etc

Originally shared by NASA Jet Propulsion Laboratory

Water ice makes up half or more of an underground layer in a large region of Mars halfway from the equator to the north pole.

http://go.nasa.gov/2fZDu7P

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