You know, dark matter matters.

The Big Bang Theory: When geeky scientists can be main characters in a hit prime time series, you know there's hope for the world.

Part of knowing how to think is knowing how the laws of nature shape the world around us. Without that knowledge, without that capacity to think, you can easily become a victim of people who seek to take advantage of you.

I believe that the manned space program can engage the public by advancing the space frontier. Every next mission takes you farther out in space than you were before, either technologically or in terms of distance.

Most science fiction is about tomorrow, a tomorrow brought to you by innovations in science and technology, and China was worried that if they just have everybody learning what is, they're not going to be in a position to invent a tomorrow because their brain isn't even wired to go in that direction.

The more of us that feel the universe, the better off we will be in this world.

When I reach to the edge of the universe, I do so knowing that along some paths of cosmic discovery, there are times when, at least for now, one must be content to love the questions themselves.