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"New York, July 10: NASA's Mars Reconnaissance Orbiter has found that carbon dioxide ice more often covers the ground at night in some mid-latitude regions than in polar regions of the Red Planet, where it is generally absent for much of summer and fall. Some dusty parts of Mars, at night year rou.."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ap7am.com/english-news-28983-mars-orbiter-finds-carbon-dioxide-ice-on-red-planet.html>