Curiosity is unknown. All adults were once kids and once curious, but as adults you don't remember that and you see curiosity when it's expressed in children as a pathway to household disaster. They're simply exploring their environment, manifesting their curiosity. So what you need to do is create an environment where curiosity is rewarded rather than punished, or thwarted.

I've known from long ago that the universe was calling me. If you were one of those annoying adults that said, 'Oh, what are you gonna be when you grow up?' I would say, 'Astrophysicist .' And then they'd walk away real quickly.

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

As important as the civil rights movement was, I think what will rise to the top is that we left Earth in that time.

If you look at Einstein's equations and put in low speeds and low gravity, they become Newton's equations.

Enjoying science shouldn't be rocket science.

If NASA were advancing a space frontier there would be challenges you've never seen before. You have to be creative and you have to patent some new idea. You get to Mars...well, how do we get the water from the soil? I gotta invent a new device that will do that. And the carbon dioxide in the atmosphere, how can we use that? Can we breathe the oxygen from the carbon dioxide?