Curiosity is a self-driven motivation to explore and to learn. Learning is like... you know, you have to take your medicine. And that is what it has become. And that's unfortunate.

That's the point, to get the people who wouldn't otherwise think to eavesdrop on a conversation that involves science.

In the end, it's the people who are curious who change the world.

Also, where does your identity come from? Your memory, of course.

There's a lot of memorization that goes on in school. You memorize vocabulary words and all these sorts of things.

Physics is the only profession in which prophecy is not only accurate but routine.

For me, one of the most fertile consequences of the space program is the extent to which it stimulates people to innovate because they want to create a different tomorrow than what they're living in today. And it's that culture of innovation that spawns entirely new economies.