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Published online 17 February 2005 | Nature | doi:10.1038/news050214-15
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Mars Express scuppers greenhouse hopes
Martian surface has not seen liquid water for billions of years.
If life exists on the surface of Mars, it has not encountered liquid water for several billion years, scientists say. It seems that the European Space Agency's orbiter, Mars Express, has found no evidence of the necessary greenhouse effect.
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