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Published online 25 February 2005 | Nature | doi:10.1038/news050221-15
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Formaldehyde claim inflames martian debate
Top scientist defends data that he says point strongly to life on Mars.
Formaldehyde has been found in the martian atmosphere, according to a senior scientist working with the Mars Express orbiter. If correct, the discovery provides strong evidence that Mars is either extremely geologically active, or harbouring colonies of microbial life.
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