I think the greatest danger of the promise of space travel is that it can lead us to be cavalier about the world we live on, if we assume we can find or make more worlds. I think in our lifetimes we surely will not, probably in the lifetimes of our great-great-grand-descendants we will not.

I think my first love is film. There's something about the span of it and the completion of the experience. You sit down for two hours, in the dark, and you go somewhere else, and then you come back, having completed a journey.

I would say that working with Ridley Scott makes the process of directing much more terrifying.

The multiverse as a real physical construct within physics overlapping with a more mystical understanding of many possible worlds - the notion of there being a root down at the quantum level between intention and reality, between consciousness and existence - it's not a matter of trying to explain the mystery of magic away with a pat mechanism of a pseudoscience, it's just a matter of trying to ground it in a domain.

I will never probably have the mathematical foundation to truly understand what string theorists are talking about, but it feels good, just for its own sake, to get as close to an understanding as you can.

The reality of space travel I think is somewhere in the middle. We will get there, it will be hard, it will take a long time, and in the end, the most extraordinary thing we will find when we get there will be ourselves.

Real space movies have to involve zero gravity and a world without up or down.