This episode features Len Fisher, a physicist and author known for his engaging science books, David Sweeney, a physicist uncovering the mysteries of ancient stars, Jared Diamond, an acclaimed author examining societal evolution, and Felice Jacker, an expert in nutritional psychiatry. They explore the vital link between healthy soils and human well-being, the necessity of altruism in self-interested societies, and the fascinating remnants of dead stars. Their discussions blend science with practical insights, focusing on how caring for our environment can enhance both agriculture and mental health.