Daniel Loxton is the editor of Junior Skeptic magazine, a staff writer for Skeptic magazine, and the author of Evolution: How We and All Living Things Came to Be and Ankylosaur Attack (Tales of Prehistoric Life) . He is also an illustrator specializing in complex computer-generated and mixed-media scenes of photorealistic creatures, such as dinosaurs and aliens. In addition to his many Junior Skeptic covers, he has designed covers for Yes Mag , Skeptic , Free Inquiry , and Princeton University's Common Sense . He has also contributed interior illustrations to the American Geological Institute's Geotimes magazine (now called Earth ). Donald R. Prothero is professor of geology at Occidental College in Los Angeles and lecturer in geobiology at the California Institute of Technology in Pasadena. A fellow of the Geological Society of America, the Paleontological Society, and the Linnaean Society of London, Prothero is on the editorial board of Skeptic magazine and has received fellowships from the Guggenheim Foundation and the National Science Foundation. In 1991, he received the Schuchert Award for outstanding paleontologist under the age of 40.

He is the author, coauthor, editor, or coeditor of 22 books and more than 200 scientific papers, and his titles for Columbia University Press are Evolution: What the Fossils Say and Why It Matters (which won the PSP Award for Excellence in Earth Sciences from the Association of American Publishers), From Greenhouse to Icehouse , and The Eocene-Oligocene Transition .