Correction.
In Bernard D. Davis' article "Bacterial domestication: Underlying assumptions" (Policy Forum, 13 Mar., p. 1329), the word "no" was erroneously omitted from the last sentence of the first full paragraph in column two on page 1334. The sentence should have read, "But this view builds on a parallel between genetic engineering and the physical technologies, rather than on a much closer model, with very different predictions: the domestication of wild organisms, resulting in enormous benefits and no catastrophes."