In this episode of Talk Nerdy, Cara is joined by neurologist Dr. R. Douglas Fields to talk about his new book, "Electric Brain: How the New Science of Brainwaves Reads Minds, Tells Us How We Learn, and Helps Us Change for the Better." They discuss the discovery of brain waves in the 1920s and how this incredible science has more recently led to innovation in understanding human behavior, treating disease, and beyond.