Marc Bekoff is Professor of Environmental, Population, and Organismic Biology at the University of Colorado, Boulder.

Colin Allen is Distinguished Professor in the Department of History and Philosophy of Science at the University of Pittsburgh. He is coauthor of Species of Mind and coeditor of Nature's Purposes and The Cognitive Animal, all published by the MIT Press.

Gordon Burghardt is Alumni Distinguished Professor in Psychology and in Ecology and Evolutionary Biology at the University of Tennessee. He is a coeditor of The Cognitive Animal (MIT Press, 2002), past president of the Animal Behavior Society, and editor of the Journal of Comparative Psychology.