I think that 'Halo' is a hard property because they don't need to make a film. They make far more money out of the games so why risk?

Trying to ground everything in reality was the most important thing to me.

We just did the best we could with quite a limited budget, to be honest, and had a lot of success.

I read every screenplay that was being sent to the other directors. None were being sent to me, but I was reading what others were choosing and what the best writers were writing.

Science without religion is lame, religion without science is blind.

The parts of physics that are exact are the parts of physics that are exact. The parts that are inexact are vastly greater. Sensible scientists don't waste their time pushing against doors that endlessly will not give. They are opportunistic and go where they can, but there are pitfalls in that.

When radium was discovered, no one knew that it would prove useful in hospitals. The work was one of pure science. And this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it.

I'm doing a book, 'Chasing Science,' about the pleasures of science as a spectator sport.