Pope Gregory IX was apparently a dog person, because he tried to exterminate all cats from Europe. Over 200 million people live in Nigeria, which is almost twice as many people as the second-most populous African nation, Ethiopia. Maya Angelou was the first African American woman to write a non-fiction best seller. Chuck E. Cheese's full name is Charles Entertainment Cheese. Barbie's real full name is Barbara Millicent Roberts. The Greek philosopher Diogenes the Cynic was the original Oscar the Grouch: he chose to be homeless and slept in a large ceramic jar near the marketplace.