In this gripping book Dr. Kenneth Kamler explores six extreme environments: underwater, high altitude, water surface, jungles, deserts, and outer space. Using both first-hand experience and sur-vival accounts, he reveals the human body's reactions to physi-cal challenges-heat, cold, pressure, deprivation, exhaus-tion-and its mind-boggling capa-cities. Surgeon, vice president of the world-famous Explorer's Club, veteran of several Everest climbs (including the one documented so unforgettably in Into Thin Air, on which he was the attending physician), Kamler knows what happens to the body in the worst of circum-stances. This book is the result of his unique experience with life-and-death struggles at the extremes-a scientific nail-biter that takes readers to places they will never forget.