About the Author

Carl C. Swisher III is an associate professor in the Department of Geological Sciences at Rutgers University.

Garniss H. Curtis, a pioneer of modern techniques for dating ancient rocks, is Chairman of the Board of Directors of the Berkeley Geochronology Center.
Roger Lewin is the author of seventeen books, including Bones of Contention and Complexity: Life at the Edge of Chaos, both available from the University of Chicago Press.