Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'
Stephen HawkingBecause 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 HawkingThere is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.
Stephen Hawking