Quote

Even if it turns out that time travel is impossible, it is important that we understand why it is impossible.

The bottom line is that time travel is allowed by the laws of physics.

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

If there's a story I absolutely cannot tell without faster-than-light travel, then I am quite prepared to accept it - even though I don't personally believe it is possible.

Events often move faster than our ability to comprehend them.

Nothing in the universe can travel at the speed of light, they say, forgetful of the shadow's speed.

Relativity challenges your basic intuitions that you've built up from everyday experience. It says your experience of time is not what you think it is, that time is malleable. Your experience of space is not what you think it is; it can stretch and shrink.

I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.

Time travel offends our sense of cause and effect - but maybe the universe doesn't insist on cause and effect.

The speed of light sucks.