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By Science News

Magazine Issue: Vol. 136 No. #23, December 2, 1989

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A version of this article appears in the December 2, 1989 issue of Science News.

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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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