Antony Dean is associate professor of biological chemistry at the Finch University of Health Sciences/The Chicago Medical School. He earned his Ph.D. in population biology at Washington University in St. Louis. His current research centers on the evolutionary stability of simple competitive ecosystems as well as protein evolution. Address: Department of Biological Chemistry, FUHS/CMS, 3333 Green Bay Road, N. Chicago, IL 60064-3095. Internet: deana@mis.finchcms.edu.