Robert A MartinRobert A. Martin holds a Ph.D. in Zoology from the University of Florida. Over his more than 40 years of research in vertebrate paleontology and paleoecology, supported in part by the National Geographic Society and National Science Foundation, Bob hs specialized in studying the origin and dynamics of biological diversity, primarily in rodents, on the Central Great Plains of the United States and in southern Spain. Now Professor Emeritus at Murray State University in Murray, Kentucky, Bob resides in Erie, Pennsylvania. Read More Read Less