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Enrique Fanjul

My guess is this methane comes from the green stuff that has been photographed by the Global Surveyor and the Mars Express. This green stuff has been studiously avoided in most reports, or ascribed to minerals such as olivine. However olivine is not stable in moist environments, and these green spots appear wherever there are features that suggest the presence of water

Charles Schmidt

Why assume that the green stuff is alive when olivine explains it just as well?

There are "water features" across the planet, and the (liquid) water would have to predate the olivine. But that is not implausible, is it?

Wouldn't the chlorophyll have revealed itself by now spectroscopically?

Ronnie J

Yes,youre right.
But no one cares.

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