After her plane crashes, a seventeen-year-old girl spends eleven days walking through the Peruvian jungle. Against all odds, with no food, shelter, or equipment, she gets out. A better equipped group of adult survivors of the same crash sits down and dies. What makes the difference? Examining such stories of miraculous endurance and tragic death, Deep Survival takes us from the tops of snowy mountains and the depths of oceans to the workings of the brain that control our behavior. Through analysis of case studies, the author describes the essence of a survivor and offers steps for staying out of trouble. In the end, he finds, it is what's in your heart, not what's in your pack, that separates the living from the dead. This book will change the way we understand ourselves and the great outdoors.