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Nature 428, 627-630 (17 March 2004) | doi:10.1038/nature02461;
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Perennial water ice identified in the south polar cap of Mars
The inventory of water and carbon dioxide reservoirs on Mars are important clues for understanding the geological, climatic and potentially exobiological evolution of the planet. From the early mapping observation of the permanent ice caps on the martian poles, the northern cap was believed to be mainly composed of water ice, whereas the southern cap was thought to be constituted of carbon dioxide ice.
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