But it may not explain the presence of the gas on the Red Planet today.
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References
Ehlmann, B. L. et al. Science 322, 1828–1832 (2008).
Mumma, M. J. et al. Science 323, 1041–1045 (2009).
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Hand, E. Methane-producing mineral discovered on Mars. Nature (2009). https://doi.org/10.1038/news.2009.197
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DOI: https://doi.org/10.1038/news.2009.197