In this episode of Talk Nerdy, Cara is joined by evolutionary psychologist Dr. Sarah E. Hill to talk about her new book, "This Is Your Brain on Birth Control: The Surprising Science of Women, Hormones, and the Law of Unintended Consequences." They discuss the long history of scientific inquiry that ignores women's bodies and minds, as well as what new research is telling us about birth control's sweeping effects. Follow Sarah: @sarahehillphd.