The surprising discovery of methane in Mars's atmosphere could be a sign of life there. Researchers are now working out how to find its source, reports Katharine Sanderson.
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Katharine Sanderson is a reporter for Nature in London.
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Sanderson, K. Planetary science: A whiff of mystery on Mars. Nature 463, 420–421 (2010). https://doi.org/10.1038/463420a
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DOI: https://doi.org/10.1038/463420a
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