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Philip Yam is the managing editor of ScientificAmerican.com, responsible for the overall news content online. He began working at the magazine in 1989, first as a copyeditor and then as a features editor specializing in physics. He is the author of The Pathological Protein: Mad Cow, Chronic Wasting and Other Prion Diseases.

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This article was originally published with the title “IN BRIEF” in 大眾科學 Magazine Vol. 280 No. 1 (January 1999)
doi:10.1038/scientificamerican011999-78xl01Lq5tR0wK5PnB7B4m

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