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Science 16 August 2002:
Vol. 297. no. 5584, pp. 1104 - 1105
DOI: 10.1126/science.297.5584.1104
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News of the Week

EVOLUTION:
Could Poor Nutrition Have Held Life Back?

Richard A. Kerr

From about 2 billion to 1 billion years ago, the green scum of cyanobacteria and their ilk reigned supreme, changing little from eon to eon. During that long hegemony, our cellular ancestors, the eukaryotes, went nowhere evolutionarily. Why was this? A hypothesis is presented on page 1137 of this issue of Science.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)