This podcast features Andrew Huberman interviewing Dr. David Anderson, a neurobiologist, about his book "The Nature of the Beast: How Emotions Guide Us." The discussion centers on the neurobiological mechanisms underlying emotions and states, differentiating between emotions (e.g., anger, happiness) and internal states (e.g., arousal, motivation). Key findings from Dr. Anderson's research on aggression in mice, including the roles of the ventromedial hypothalamus (VMH) and specific hormones like estrogen, are highlighted. The interview also touches upon the complex interplay between aggression and mating behaviors, and the potential implications of these findings for understanding mental health conditions. Listeners gain a deeper understanding of the neural circuits governing emotions and the limitations of simplistic views on hormones and aggression.