The world's most famous doll
was first introduced on March 9, 1959, by a southern California toy company called Mattel, Inc. Ruth Handler, who co-founded Mattel with her husband Elliot, spearheaded the introduction of the doll all those years ago, and how Barbie looks so good at 60 is just another one of her fitness secrets we’ll never know.As it turns out, there's a lot of things you probably don't know about the "ultimate American girl"—like her full name, or the worst piece of advice she ever gave girls. Click through to have your mind blown!