When NASA dreams big America dreams big. People...kids say, 'I want to do that when I grow up'. Because you want to do what's visible to you.

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

If you find life on Europa [Jupiter's moon], like, what would you call it? Would it be, like, Europeans?

Passion is what gets you through the hardest times that might otherwise make strong men weak, or make you give up.

When we see animals doing remarkable things, how do we know if we're simply seeing tricks or signs of real intelligence? Are talented animals just obeying commands, or do they have some kind of deeper understanding? One of the biggest challenges for animal researchers is to come up with tests that can distinguish between the two.

The very nature of science is discoveries, and the best of those discoveries are the ones you don't expect.

If you need to invoke your academic pedigree or job title for people to believe what you say, then you need a better argument.