If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

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.

I'm a little fatigued of adults saying we've got to worry about the kids. And these are the same adults that don't know science and are running things and wielding resources and legislation.

While I'm a big fan of science fiction, especially as rendered in expensive Hollywood blockbusters, it's the real universe that calls to me. To fall into a black hole, that is more amazing than anything I've ever read in a science-fiction story.

A common way to compute density is, of course, to take the ratio of an object's mass to its volume. But other types of densities exist, such as the resistance of somebody's brain to the imparting of common sense.

You can't be a writer and have nothing to write about. You have to have life experiences.

There is no greater education than one that is self-driven.