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Atmospheric chemistry

Her dark materials

A glitch in the history of sulphur isotopes could imply that methane emitted by the ancient biosphere created a high-altitude photochemical smog, which governed the climate in a distinctly Gaian way.

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Figure 1: Variation in ancient sulphur.


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Zahnle, K. Her dark materials. Nature 454, 41–42 (2008).

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