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October 28, 2008; vol. 105 no. 43

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Cover image: The genetic code is the fundamental alphabet of life. This code, once thought to be universal and the same for all forms of life, shows a few enigmatic deviations between different species, e.g., bees and feather stars. One of those anomalies may be a primordial adaptation to aerobic respiration and oxidative stress, which results in a high concentration of methionine within the mitochondria. See the article by Aline Bender et al. on pages 16496–16501. Artwork courtesy of Michael Plenikowski (University of Mainz, Mainz, Germany).

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