If you're interested in something, that's all that matters. You'll spend more time doing it, that than anything else, and possibly more time doing it than anybody else.

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

When you innovate, you create new industries that then boost your economy. And when you create new industries and that becomes part of your culture, your jobs can't go overseas because no one else has figured out how to do it yet.

I think on some level, role models are overrated If you require a role model who looks just like you to be something you wanna be and you can't find one, is that a reason to not be what you wanna be? No!

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

On Friday the 13th, April 2029, an asteroid large enough to fill the Rose Bowl as though it were an egg cup will fly so close to Earth that it will dip below the altitude of our communication satellites. We did not name this asteroid Bambi. Instead, we named it Apophis, after the Egyptian god of darkness and death.

I don't see why there is no intelligent alien life in the universe.