Donald Prothero has taught college geology and paleontology for 45 years, at Caltech, Columbia, Cal Poly Pomona, and Occidental, Knox, Vassar, Glendale, Mt. San Antonio, and Pierce Colleges. He earned his B.A. in geology and biology (highest honors, Phi Beta Kappa, College Award) from University of California Riverside in 1976, and his M.A. (1978), M.Phil. (1979), and Ph.D. (1982) in geological sciences from Columbia University. He is the author of over 50 books (including 8 leading geology textbooks, and several trade books), and over 400 scientific papers, mostly on the evolution of fossil mammals (especially rhinos, camels, and pronghorns) and on using the earth's magnetic field changes to date fossil-bearing strata. He has been on the editorial boards of journals such as Geology, Paleobiology, Journal of Paleontology, and Skeptic magazine. He is a Fellow of the Linnean Society of London, the Paleontological Society, and the Geological Society of America, and also received fellowships from the Guggenheim F