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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.

Boundaries are actually the main factor in space, just as the present, another boundary, is the main factor in time.

What really made me think about space and begin to think about ways to use it was Einstein's statement that there are no fixed points in space. Everything in the universe is moving all the time.

Time and space - time to be alone, space to move about - these may well become the great scarcities of tomorrow.

And what we know, or think we know, about the universe of space and time is changing very quickly.

I've been thinking a lot about space. It was one of those slow-motion realisations how little we are, how far we are from everything else in our solar system. This idea of distance started kind of haunting me. How do you go forth and accomplish things but not end up leaving everything you started out with in the dust?

I always think of space-time as being the real substance of space, and the galaxies and the stars just like the foam on the ocean.

Before 1915, space and time were thought of as a fixed arena in which events took place, but which was not affected by what happened in it. Space and time are now dynamic quantities... space and time not only affect but are also affected by everything that happens in the universe.

Space is an inspirational concept that allows you to dream big.