Mars Methane Mystery: What's Making the Gas?

Methane in Mars' atmosphere lasts less than a year meaning something -- either geologic or biological -- keeps belching it out.

  • The first planet-wide studies of methane on Mars shows gas concentrations peak in autumn and plummet in winter.
  • The methane could be produced by geologic or biological activity.
  • The rapid removal of the chemical from the atmosphere is as much a mystery as what's producing it.

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