At the Human Edge is a nonfiction popular science book that unravels the amazing adaptive physiological responses that our bodies undergo as we push ourselves to the physical limits in human performance. Each chapter is dedicated to a unique extreme environment, on Earth and beyond. The book captures the history, geography, legacy and the physical challenges that our physiology faces in our attempt to conquer the great outdoors. From Mt. Everest to the South Pole, from a journey to Mars to the bottom of the Mariana Trench, from running marathons to surviving in the Sahara, this highly informative, gripping and accessible book lays out the complex world of cellular biology against the backdrop of human history.