Bill Gifford is a contributing editor for Outside magazine and has written on science, sports, and fitness for numerous publications including Wired, Businessweek, Men's Health, Men's Journal, Slate, and The New Republic. He has been features editor of Men's Journal and executive editor of Philadelphia magazine. He is the author of several books including Ledyard: In Search of the First American Explorer, Catholic Worker Daze, and Spring Chicken: Stay Young Forever (or Die Trying).