In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down.
Stephen HawkingWe find ourselves in a bewildering world. We want to make sense of what we see around us and to ask: What is the nature of the universe? What is our place in it and where did it and we come from? Why is it the way it is?
Stephen HawkingWhat you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.
Stephen HawkingOur population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill. But our genetic code still carries the selfish and aggressive instincts that were of survival advantage in the past. It will be difficult enough to avoid disaster in the next hundred years, let alone the next thousand or million. Our only chance of long term survival, is not to remain inward looking on planet Earth, but to spread out into space.
Stephen Hawking