How is it possible that huge groups of people can all fall ill or be incapacitated by a physical sickness no doctor can diagnose? How can hundreds of citizens across a city be moved to perform some odd repeated behavior for days or even weeks on end with no biological cause? Today’s episode will explore some famous instances of mass hysteria, and then try to answer just these questions. --- Welcome to Psychologia, a scientific exploration of the strange and pathological. www.psychologiapodcast.com