Travis Macy has snowshoed across Canada's desolate plains, run across Mexican deserts, and trekked, kayaked, climbed, and swum through horizontal freezing rain in the Scottish Highlands. In 2013, he won the Leadman marathon/bike race in the Rockies. He is a sought-after speaker, endurance coach, and writes for Ultra Running Magazine, Backpacker Magazine, and Trail Runner Magazine. He is also a stay-at-home dad and remote high school teacher.

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John Hanc is the author of thirteen books, including the award-winning memoirs The Coolest Race on Earth and Not Dead Yet (with Phil Southerland). Hanc is also a contributing editor for Runner's World magazine, a contributing writer for Newsday, and a frequent contributor to the New York Times and Smithsonian.com. His writing covers a wide range of topics, but it usually has this in common: It's about people, past and present, who do extraordinary things.