David Quammen, Lynn Margulis, Dorion Sagan, Helena Norberg-Hodge, Stephen Jay Gould, Daniel B. Botkin, Eric D. Schneider, George P. Horse Capture, Anna K. Behrensmeyer, Bernice Wuethrich, Michael Garstang, Edward S. Ayensu, Alan Cutler, Barbara Boyle Torrey, Tom O'Neill, Gretchen C. Daily, Robert Fri, William Melson, Jonathan Overpeck