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

You need a human story to intersect those points of interest with real stakes on the line, and then things start to be fun, where you can see the ramifications, you see the impact on people's lives of big changes - like taking a man of science, like a surgeon, and robbing him of his understanding of the universe and forcing him into a newer and wider understanding.

A lot of screenwriters have a drawer of unsold scripts that they cut their teeth on. I don't have one. Everything I've written, after my first spec, I wrote on assignment. Everything I've written was work.

I studied physics at Princeton when I was a college student, and my initial intention was to major in it but to also be a writer. What I discovered, because it was a very high-powered physics program with its own fusion reactor, was that to keep up with my fellow students in that program I would need to dedicate myself to math and physics all the time and let writing go. And I couldn't let writing go, so I let physics go and became a science fan and a storyteller.

Space and spacecraft and zero gravity and so forth are very difficult to render.

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.

An X-wing fighter flies like an airplane. If you look at the physics, it's actually quite impossible.