Space exploration is a force of nature unto itself that no other force in society can rival.

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.

Mars once was wet and fertile. It's now bone dry. Something bad happened on Mars. I want to know what happened on Mars so that we may prevent it from happening here on Earth.

Never presume that just because you disagree with an idea that you must be correct.

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 cosmic calendar is quite a fertile mode for communicating how small we are over time and space.

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