Snke Johnsen is professor of biology at Duke University. He is the author of The Optics of Life: A Biologist's Guide to Light in Nature and the coauthor of Visual Ecology (both Princeton). Marlin Peterson, who created original illustrations for this book, is an illustrator and muralist who teaches and illustrates in many styles and media. He also specializes in giant optical illusions such as his harvestmen mural below the Space Needle in Seattle, and his full portfolio can be found at marlinpeterson.com.