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Mars Gullies Likely Not Formed By Liquid Water
The highly incised Martian gullies seen in the top image resemble gullies on Earth that are carved by liquid water. However, when the gullies are observed with the addition of mineralogical information (bottom), no evidence for alteration by water appears
Credit: NASA/JPL-Caltech/UA/JHUAPL
New findings using data from NASA's Mars Reconnaissance Orbiter show that gullies on modern Mars are likely not being formed by flowing liquid water.
From Jet Propulsion Laboratory/NASA
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