Perhaps we’ve never been visited by aliens because they have looked upon earth and decided there’s no sign of intelligent life.

It would be amazing if something completely spiritual sounding happened. Oh, my gosh! We'd be all over it. Because it's something new about the physical universe.

If you want a nation to have space exploration ambitions, you've got to send humans.

No one with a living room radio that was a piece of furniture at the time would say, gee. I want to carry that around on my hip pocket. That was not a thought until NASA initiated this whole exercise. So there's an influence that's not just spinoff.

I never got into 'Star Wars.' Maybe because they made no attempt to portray real physics. At all.

Many people feel small because they're small and the universe is big, but I feel big.

I'm not a scientist, I was not a good science student, I felt effectively alienated from science throughout my young life, and it was only when I became an adult that I began to really appreciate from a completely different angle the power of science.