Marc Bekoff is professor emeritus of ecology and evolutionary biology at the University of Colorado Boulder. He has published numerous books, including The Emotional Lives of Animals, and has provided expert commentary for many media outlets, including the New York Times, CNN, and the BBC.
Colin Allen is Professor of Philosophy at Texas A&M University. He is the coauthor of Nature's Purposes (MIT Press, 1998), Species of Mind (MIT Press, 1997), and The Cognitive Animal (MIT Press, 2001).