What makes clowns both funny & scary?

Who were the first clowns in history? What role do clowns play in society? How do you become a professional clown? For free home activities sign-up at www.WhoSmarted.com See omnystudio.com/listener for privacy information. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.