“His pioneering impulses allowed me to think about my own body in an entirely new way, and it is hard to express how much gratitude and respect I have for him.” GratitudeRespectPioneer Book:What Doesn't Kill Us: How Freezing Water, Extreme Altitude, and Environmental Conditioning Will Renew Our Lost Evolutionary Strength Source: What Doesn't Kill Us: How Freezing Water, Extreme Altitude, and Environmental Conditioning Will Renew Our Lost Evolutionary Strength