A Brief History of Time begins with a striking image and a wonderful true story: An elderly lady attended a public lecture given by an astrophysicist on how the Earth goes around the Sun and how the Sun circles about with countless other stars in our galaxy the Milky Way. During the question and answer session, the woman stood up and told the distinguished scientist that his lecture was nonsense, that the Earth is a flat disk supported on the back of an enormous tortoise. The scientist tried to outwit the lady by asking, "Well, my dear, what supports the tortoise? "To which she replied, "You're a very clever young man, but not clever enough. It's turtles all the way down! "