A Brief History of Time – Stephen Hawking
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The earth orbits around the sun and how the sun, in turn, orbits around the center of a vast
collection of stars called our galaxy.
A well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. He
described how the earth orbits around the sun and how the sun, in turn, orbits around the center of a vast
collection of stars called our galaxy. At the end of the lecture, a little old lady at the back of the room got up and
said: “What you have told us is rubbish. The world is really a flat plate supported on the back of a giant
tortoise.” The scientist gave a superior smile before replying, “What is the tortoise standing on.” “You’re very
clever, young man, very clever,” said the old lady. “But it’s turtles all the way down!”