CHARLES WOHLFORTH is the author of more than ten previous books. He writes a column for Alaska Dispatch News, hosts a weekly interview program for public radio stations in Alaska (where he lives), and has won the Los Angeles Times Book Prize for Science and Technology, among many other awards.
AMANDA R. HENDRIX, Ph. D. , a planetary scientist, worked for twelve years at NASA's Jet Propulsion Laboratory. She has been a scientific investigator on the Galileo and Lunar Reconnaissance missions, a principal investigator on NASA research and Hubble Space Telescope observing programs, and is the author of many scientific papers. As an investigator on the Cassini mission to Saturn, she has focused her research on the moons of Saturn.
