.@kchangnyt My money's on Martian marsh gas. Pockets of water with microbial life. I'd want to know if there's for a seasonal correlation in the increased levels. MT Something on Mars Is Producing Gas Usually Made by Living Things on Earthhttps://nyti.ms/2FH95J5
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My money's on it being geological not biological. The chances of anything at all being alive on the surface must be incredibly slim, being bathed as it is in cosmic rays and solar radiation without the benefit of a decent magnetic field as shielding.
But go below the surface one meter or so, and radiation is no longer a problem. There's a lot of life INSIDE Earth including methanogens.https://www.nytimes.com/2016/09/13/science/south-african-mine-life-on-mars.html …
