Jeanette A. Thomas is a professor of biology at Western Illinois University. She is the coeditor of four books, including "Sensory Abilities of Aquatic Mammals and Marine Mammal Sensory Systems," Cynthia F. Moss is a professor of psychology and member of the Institute for Systems Research at the University of Maryland, College Park. She is the coeditor of "Neuroethological Studies on Cognitive and Perceptual Processes," Marianne Vater is a professor in the Department of Physiology and Cell Biology at the University of Potsdam, Germany.