What if there were no limits?

Thrive or die: That’s the rule of evolution. Despite this brutal logic, some species have learned to survive in even the most hostile conditions. Others couldn’t—and perished. While incremental genetic adaptations hone the physiology of nearly every creature on this planet, there’s another evolutionary force that is just as important: the power of choice. In this explosive investigation into the limits of endurance, journalist Scott Carney discovers how humans can wedge control over automatic physiological responses into the breaking point between stress and biology. We can reclaim our evolutionary destiny.