On the fifth day he realized his only hope of escape was to amputate his own arm
The human body is a marvel of perfectly synchronized chemical reactions choreographed to perform optimally in a relatively narrow range of external conditions. While it is possible for the human organism to adapt to environmental stresses, it doesn’t take much for its symphony of physiology to collapse into chaotic discord. When deprived of water, food, or oxygen these processes begin to break down. If internal body temperature varies by more than four degrees, malfunction is imminent. Despite this fragility, when put to the test the body can prove to be extraordinarily resilient. […]