About the Author
Arthur Benjamin, Ph.D., is a professor of mathematics at Harvey Mudd College in Claremount, California. Dr. Benjamin's articles have been featured in Scientific American and Discover. He is coauthor of Mathemagics.
Michael Brant Shermer, Ph.D., is founder and director of The Skeptics Society and the publisher of Skeptic magazine. He is the author of several books, including Teach Your Child Science.