I thought Eddie Redmayne portrayed me very well... At times I thought he was me.

The thing about smart people is that they seem like crazy people to dumb people.

Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory.

I am discounting the reports of UFOs. Why would they appear only to cranks and weirdos?

One is always a long way from solving a problem until one actually has the answer.

I don't know what my IQ is. People who gloat about their IQ's are losers

We explore because we are human and we want to know. I hope that Pluto will help us on that journey.