People put clips of me up. There are quotes from me. I've written books, of course. I'm on Twitter. There are dozens of ways to consume my offerings, and a lecture in a large venue is really only just one of them. So I have no concerns about how much access people would have to me no matter what is the capacity of your pocketbook.

NASA has spin-offs, and it's a huge and very impressive list, including accurate and affordable LASIK eye surgery.

Life existed on Earth for nearly four billion years before anything remotely resembling a human being showed up. And even then, when we started to branch off from other apes about 10,000,000 years ago, our ancestors looked pretty different.

Space enthusiasts are the most susceptible demographic to delusion that I have ever seen.

WhenIWasYourAge: People were never "living with their disease." We cured them. Or they died from it.

Kids should be allowed to break stuff more often. That's a consequence of exploration. Exploration is what you do when you don't know what you're doing.

All information is good, even when it is bad.