How much cold can the human body actually survive? Humans aren't built for extreme cold. As temperatures fall, the body begins an extraordinary fight to protect what matters most—redirecting warm blood away from the skin and muscles and toward vital organs like the heart and brain. But that defense has limits. Once core body temperature drops below about 95°F (35°C), hypothermia begins. Frostbite can damage or destroy frozen tissue, and in freezing water, the body loses heat dramatically faster than it does in air at the same temperature. In the award-winning series Bright Now, Beyond Cold follows emergency physician and experienced mountaineer Emmanuel Cauchy as he explores what happens when the human body is pushed to the edge by extreme cold—and why some people survive conditions that can quickly become deadly. From the science of hypothermia and frostbite to the delicate process of warming a severely cold patient, discover how our bodies fight to stay alive in one of Earth's m...