Thinking Unselfishly

Abstract

ally such large earthquakes in subduction zones, which are produced by large oceanward slip of the overlying plate, induce some extension in the volcanic arc further landward. Such extension can lower the pressure on trapped magma, inducing or hastening eruptions or leading to further melting. The authors recommend a close watch of generally quiet volcanoes in Indonesia over the next few years.-BH Geology 35, 539 (2007). ENVIRONMENTAL SCIENCE Fish Fatalities in the Field Municipal wastewaters contain an enormous variety of chemicals, and fish located in downstream waterways have been reported to show alterations in reproductive endocrine function. Such male fish express proteins, such as vitellogenin, that are naturally found in the female reproductive system, and these males have been shown to develop early-stage eggs. It has been proposed that natural or synthetic estrogens in the water may contribute to the feminization of male fish, and controlled laboratory studies support this claim. Kidd et al. describe in detail a whole-lake analysis of