Nicols Fox, an independent journalist for more than 20 years, has written on subjects ranging from emerging pathogens to the nature of laughter. She is the author of "Spoiled: Why Our Food is Making Us Sick" (BasicBooks, 1997) and "It Was Probably Something You Ate" (Penguin, 1999). She has appeared on numerous television programs, has written regularly for "The Economist", and her articles, essays, and book reviews have been published in "The New York Times, The Washington Post, The Los Angeles Times, Newsweek, and USA Today".