Study Links Fresh Mars Gullies To Carbon Dioxide

Pasadena CA (JPL) Oct 30, 2010 A growing bounty of images from NASA’s Mars Reconnaissance Orbiter reveals that the timing of new activity in one type of the enigmatic gullies on Mars implicates carbon-dioxide frost, rather than water, as the agent causing fresh flows of sand. Researchers have tracked changes in gullies on faces of sand dunes in seven locations on southern Mars. The periods when changes occurred, as dete


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