Potatoes were introduced to Ireland in the 1500s after they were discovered by Spanish colonizers of South America. When animals sleep through a cold period it's called hibernation, but when animals sleep through a hot period it's called estivation. Chuck E. Cheese's full name is Charles Entertainment Cheese. 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. The book Green Eggs and Ham was written by Dr. Seuss as part of a bet with a publisher that he couldn't write a book only 50 words. (Seuss won.) Interracial marriage in the United Sates was banned in 1664 and not overturned until 1967.