Jack Dorsey is the CEO of Twitter and Square.

Wim Hof, better known as the Ice Man, has mastered the art of harnessing breath to unlock untapped reservoirs of consciousness, to do what most people would imagine is unfathomable.

Aubrey Marcus is the CEO and founder of Onnit, a company dedicated to human optimization and peak performance. He has pointers on things we should do day in and day out for optimal living.

Dr. Rhonda Patrick speaks with Ray Cronise, a former NASA material scientist and cofounder of zero gravity, a company that offers weightless parabolic flights to consumers and researchers. In this episode, coming at the tail end of a rather extreme 23-day water fast for Ray, we discuss, perhaps unsurprisingly, some of the benefits that are