Nasa gives us guarded hope, but they have a hard time hiding their excitement.
Quote:
In early 2003, a plume of methane gas rose from the surface of Mars.
The big unanswered question: what belched?
Subsurface Martian cows appear unlikely, but scientists are seriously considering the possibility that bacteria are generating the methane.
A team of researchers reported Thursday that methane emissions on Mars appear to come in large, brief bursts and that in 2003, the bursts originated from three specific regions in the northern hemisphere, where it was midsummer.
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http://www.nytimes.com/2009/01/16/sc...mars.html?_r=1