Richard D. Estes has led wildlife-viewing safaris in Africa for many years, and is one of the world's foremost experts on the social ecology of African mammals. Dr. Estes is an Associate Professor of Mammalogy at the Museum of Comparative Zoology at Harvard University and the chairman of the World Conservation Union's Antelope Specialists' Group. He lives in Peterborough, New Hampshire.
Edward O. Wilson is widely recognized as one of the world's preeminent biologists and naturalists. The author of more than twenty books, including The Creation, The Social Conquest of Earth, The Meaning of Human Existence, and Letters to a Young Scientist, Wilson is a professor emeritus at Harvard University. The winner of two Pulitzer Prizes, he lives in Lexington, Massachusetts.