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By Science News

Magazine Issue: Vol. 140 No. #9, August 31, 1991

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Questions or comments on this article? E-mail us at feedback@sciencenews.org | Reprints FAQ

A version of this article appears in the August 31, 1991 issue of Science News.

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Science News

Science News was founded in 1921 as an independent, nonprofit source of accurate information on the latest news of science, medicine and technology. Today, our mission remains the same: to empower people to evaluate the news and the world around them. It is published by the Society for Science, a nonprofit 501(c)(3) membership organization dedicated to public engagement in scientific research and education (EIN 53-0196483).

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