An analysis of 12,000-year-old Antarctic ice revises our understanding of natural methane emissions to the atmosphere, and constrains estimates of the sensitivity of natural methane sources to abrupt climate-warming events. See Letter p.443
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Hopcroft, P. Ancient ice and the global methane cycle. Nature 548, 403–404 (2017). https://doi.org/10.1038/548403a
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DOI: https://doi.org/10.1038/548403a
