In an historic survey of man's adaptation to killer environmental conditions, we travel to the desert, the Arctic, the sea, jungle, and space, charting the body's physiological responses to extreme circumstances such as frostbite, heatstroke, and hypothermia. We talk with military survival experts and learn about the latest cutting-edge survival gear, as well as the equipment aboard the space station, and look to the future, when nano-technology will create a new type of technology.