06-20-2008, 12:55 AM
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http://www.nasa.gov/mission_pages/ph...-20080619.html
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"It must be ice," said Phoenix Principal Investigator Peter Smith of the University of Arizona, Tucson. "These little clumps completely disappearing over the course of a few days, that is perfect evidence that it's ice. There had been some question whether the bright material was salt. Salt can't do that."
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