Add Yahoo as a preferred source to see more of our stories on Google. Clowns in American circuses were once considered a form of adult entertainment. ArtMarie/E+ via Getty Images The scary clown has ...

Clown masks are displayed at the Fantasy Costumes HDQ. store Oct. 17, 2003, in Chicago. The creepy clown could be considered the mascot of the Halloween season, nearly as pervasive as the ...

The scary clown has become a horror staple. It can be hard to imagine a time when clowns were regularly invited to children’s birthday parties and hospital wards – not to terrorize, but to delight and ...