Comment on "Early Archaean microorganisms preferred elemental sulfur, not sulfate".

Bao, Huiming; Sun, Tao; Kohl, Issaku; Peng, Yongbo · Science · 2008

editorial · Level V

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Abstract

Philippot et al. (Reports, 14 September 2007, p. 1534) interpreted multiple-sulfur isotopic compositions of approximately 3.5-billion-year-old marine sulfide deposits as evidence that early Archaean microorganisms were not sulfate reducers but instead metabolized elemental sulfur. However, their data can be better explained by a scenario involving poor mixing of photochemical and surface sulfide sources.

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