Howard Berkes talks with naturalist Craig Childs, author of The Secret Knowledge of Water: The Essence of the American Desert. Childs documented his cross-country trek through the deserts of North America as he searched for water holes, small springs, and other signs of water. His quest took him to a place most experienced desert hikers avoid: directly in the path of a flash flood. (8:20) The Secret Knowledge of Water : Discovering the Essence of the American Desert by Craig Leland Childs is published by Sasquatch Books; ISBN: 15706
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