Stuart Pimm, Ph.D., is a professor of conservation biology at the Center for Environmental Research and Conservation at Columbia University in New York. He has been the recipient of a Pew Scholarship for Conservation and the Environment (in 1993) and an Aldo Leopold Leadership Fellowship (in 1999). Very active at the interface between conservation and policy, Pimm has been called upon to testify before both the House and Senate Committees on the re-authorization of the Endangered Species Act, and has been instrumental in the recent major initiative to restore the Florida Everglades. Pimm is the author of more than 150 scientific papers, as well as three books, and numerous popular articles and book reviews in such publications as New Scientist, The Sciences, Nature, and Science. He maintains a very active international lecturing schedule, and appears on television regularly, recently on such shows as ABC News with Peter Jennings, CNN, the Discover Channel, two program on PBS, TV Asahi (Japan), ABC (Australia), and elsewhere. Ed Wilson (of Harvard) and Pimm were the subjects of a BBC Horizon (appears in the USA as PBS's Nova) in 1996 entitled Nature's Numbers. Pimm's activities are routinely reported in the national press (twice on the front page of the New York Times in the last year) and throughout the world. On average, he is interviewed by the press several times each week.