Summertime on Mars is bringing water to the planet's surface, suggest NASA scientists who on Wednesday unveiled pictures of slender carvings in the sun-facing sides of crater walls on Mars that are believed to be etched by flowing briny water.
"Mars is salty so any water that flows in or on the surface would be salty as well," lead researcher Alfred McEwen, with the University of Arizona's Lunar and Planetary Laboratory, told Discovery News.
http://news.discovery.com/space/mars-salt-water-surface-110804.html
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