Scientists are persuaded that they have unearthed ice on Mars. Investigators at the University of Arizona have found from an examination of the spacecraft's latest imagery that white spots in a trench unearthed by the Phoenix Mars lander disappeared over the course of time, indicating that they had undergone the process of sublimination, or the evaporation of ice directly into vapor.
For an animation, see: http://www.nasa.gov/images/content/253084main_dodo_020_024.gif
Thursday, June 19, 2008
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