Still no subsurface Martian cows. But otherwise, the story of methane on the red planet gets more interesting.https://www.nytimes.com/2019/04/01/science/mars-methane-gas.html …
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Are there any theories as to why the methane seems to dissipate so quickly?
Yes. 1) perhaps methane-destroying reactions are occurring not just when gas molecules collide but also on the surface of dust grains, which might be much more efficient. 2) methane-eating microbes.
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How is no 2 possible, you mean there's life there?
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It's possible. If life ever rose early in Mars history, it could have migrated underground when the surface turned inhospitable. There's tons of life in the rocks of Earth.https://www.nytimes.com/2016/09/13/science/south-african-mine-life-on-mars.html …
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