Habitability on Mars from a microbial point of view.

  title={Habitability on Mars from a microbial point of view.},
  author={Frances Westall and Damien Loizeau and Fr{\'e}d{\'e}ric Foucher and N. Bost and Maryl{\`e}ne Betrand and Jorge L. Vago and Gerhard Kminek},
  volume={13 9},
Extraterrestrial habitability is a complex notion. We briefly review what is known about the origin of life on Earth, that is, life based on carbon chemistry and water. We then discuss habitable conditions (past and present) for established life and for the survival of microorganisms. Based on these elements, we propose to use the term habitable only for conditions necessary for the origin of life, the proliferation of life, and the survival of life. Not covered by this term would be conditions… 

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