Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'
~ Stephen Hawking
Time travel is such a magic concept.
~ Matt Smith
The bottom line is that time travel is allowed by the laws of physics.
~ Brian Greene
The most useful form of time travel would be to go back a year or two and rectify the mistakes we made.
~ Matt Lucas
Time travel offends our sense of cause and effect - but maybe the universe doesn't insist on cause and effect.
~ Edward M. Lerner
Originally, the burden of proof was on physicists to prove that time travel was possible. Now the burden of proof is on physicists to prove there must be a law forbidding time travel.
~ Michio Kaku
