[Credit: MAVEN, Laboratory for Atmospheric and Space Physics, Univ. Colorado, NASA]
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It might prove interesting to learn what the total volume of the Hydrogen amounts to. Is it commensurate with the amount which Mars might have had during its wet period, or is it more - lending some credence to the Krypton theory.
I also find it interesting that Maven found such extensive atmosphere so far above the surface of a planet which supposedly lost its atmosphere millions of years ago - more interesting that there is hydrogen which should have long vanished.