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Mars Revisited



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Ice in Retreat
Images by Malin Space Science Systems (MSSS) and NASA/JPL 

Mars appears to be warming up. This series of images from 1999, 2001, and 2003 documents changes in the planet's southern ice cap. Pits in the layers of frozen carbon dioxide, or dry ice, are growing at a rate of three to nine feet (one to three meters) in one Martian year (687 Earth days). This exceeds what scientists expect from normal seasonal fluctuations. No one knows—yet—why this ice is vanishing so rapidly.





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