Because imaginary time behaves like another direction in space, histories in imaginary time can be closed surfaces, like the surface of the Earth, with no [existential] beginning or end.
Stephen HawkingA lot of prizes have been awarded for showing the universe is not as simple as we might have thought.
Stephen Hawking[On President Bush's plan to get to Mars in 10 years] Stupid. Robots would do a better job and be much cheaper because you don't have to bring them back.
Stephen Hawking