Mark S. Blumberg is F. Wendell Miller Professor of Psychology@the University of Iowa, editor-in-chief of Behavioral Neuroscience and author most recently of Freaks of Nature: What Anomalies Tell Us About Development and Evolution (Oxford University Press, 2009). He is a member of the Delta Center@the University of Iowa, dedicated to the investigation of learning, development, and change. E-mail: mark-blumberg@uiowa.edu