Not only could nobody tell me, but nobody even had the sense that it was an interesting question. They looked at me funny. I asked my parents; I asked my parents’ friends; I asked other adults. None of them knew. My mother said to me, “Look, we’ve just got you a library card. Take it, get on the streetcar, go to the New Utrecht branch of the New York Public Library, get out a book and find the answer.”

~ Carl Sagan