New theory suggests Mars was once cold and wet

(PhysOrg.com) -- Alberto Fairуn, an astrobiologist who works for both the SETI Institute (the group using radio telescopes to listen for extraterrestrial life) and NASA’s Ames research center, along with colleagues, has published a paper in the journal Nature Geoscience, in which they describe ancient Mars as cold and wet with a large northern hemispheric ocean whose edges were lined with glaciers.

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