Tom Siegfried is the editor in chief of Science News, a biweekly magazine based in Washington D.C. Previously he was a free-lance science journalist based in Los Angeles; his work appeared in such publications as Science, Nature, and New Scientist, and he was a regular contributor to the science news website The Why Files. From 1985 to 2004 he was science editor of The Dallas Morning News. He is currently on the board of directors of the Council for the Advancement of Science Writing. He is the author of three books: The Bit and the Pendulum, (Wiley, 2000), and Strange Matters (Joseph Henry Press, 2002), and A Beautiful Math (Joseph Henry Press, 2006). He is also a contributor to the National Association of Science Writers' Field Guide for Science Writers.