A wide-open conversation with three women who guided Richard Feynman through some big adventures at the Esalen Institute. (Part of our Feynman series.) SOURCES: Barbara Berg, friend of Richard Feynman.Cheryl Haley, friend of Richard Feynman.Debby Harlow, friend of Richard FeynmaSam Stern, content creator at the Esalen Institute. EXTRAS: Richard Feynman Series, by Freakonomics Radio (2024)."The Future of Therapy Is Psychedelic," by People I (Mostly) Admire (2023).