Voice of America | Snowmelt May Have Caused Martian Valleys Voice of America Ancient runoff from melting snow may have been the cause for many of the valleys branching across Mars. Researchers at Brown University believe many of the valleys were created runoff of what they call “orographic precipitation†-- when warm, humid air is ... Mars in my lifetime? Water on Mars? Ancient Red Planet had humongous ocean, say scientists. (+ ... Revealed: How Mars Lost Its Atmosphere |
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