Fluctuating levels of methane, which is what's actually new about the Curiosity measurements, are strong evidence for active replenishment.

Sure, but there are tons of geological processes which produce methane without any involvement of life.

The discovery of methane spikes is certainly interesting, but to go from there to changing the Great Filter estimates is a looooooong jump.

I don't disagree.

Open thread, Dec. 15 - Dec. 21, 2014

by Gondolinian 1 min read15th Dec 2014309 comments

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