'Cause a musician, you can't tell me, "I've got this message I want share with the public," and it's three-and-a-half minutes long. That's not it. If your message is only three-and-a-half minutes long, then we got nothing else to talk about. Because life is more complex than three-and-a-half minutes.

If factual information upsets you, then you are creating a world that is not embracing objective truths, and that's not how you advance a democracy.

Facts are true whether or not you believe them.

There is no true understanding of Biology without Chemistry. And there's no true understanding of Chemistry without Physics.

A state of negative energy means that you are essentially getting something for nothing.

If the Sun exploded, we wouldn't know about it for 8 minutes and 20 seconds. Light and gravity take that long to reach us. Then we would vaporize.

Going into orbit around Earth - where the space station is today, and where the space shuttles and John Glenn and all those folks go-that's three-eighths of an inch above a schoolroom globe, just FYI. That's not very far from Earth. Yes, you are off Earth, but you're not really going anywhere yet. The moon was the only real destination.