601087 external_news 1516394051 1516725002 It's an established fact that Mars was once a warmer and wetter place, with liquid water covering much of its surface. Between 4.2 and 3.7 billion years ago, the planet lost its atmosphere, which caused most of its surface water to disappear. But according to a new study led by the U.S. Geological Survey, erosion on the surface of Mars has revealed abundant deposits of water ice. James Wray, an associate professor in the School of Earth and Atmospheric Sciences, contributed to the study, as did Lujendra Ojha, a former Tech researcher who led the 2015 study offering evidence of flowing water on Mars. Ojha is now at Johns Hopkins University.

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