Perennial water ice identified in the south polar cap of Mars

  title={Perennial water ice identified in the south polar cap of Mars},
  author={J. P. Bibring and Y. Langevin and François Poulet and Aline Gendrin and B. Gondet and Michel Berthé and Alain Soufflot and Pierre Drossart and Michel Combes and Giancarlo Bellucci and Vassili I. Moroz and Nicolas Mangold and Bernard Schmitt and the Omega team},
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. However, recent missions (NASA missions Mars Global Surveyor and Odyssey) have revealed… 
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