The metabolism may seem like a magical concept: some people eat whatever they want and don’t gain weight. Others so much as look at a dessert and feel the pounds creeping on. But what do we know about our metabolism? Can it speed up? Can it slow down? Does yo-yo dieting damage our metabolisms? On this episode, Juna and Eddie talk to Dr. Herman Pontzer, Associate Professor of Evolutionary Anthropology at Duke University all about the ins and outs of human energy expenditure, and what hunter gatherer tribes can teach us about how our metabolism works.