The problem in society is not kids not knowing science. The problem is adults not knowing science. They outnumber kids 5 to 1, they wield power, they write legislation. When you have scientifically illiterate adults, you have undermined the very fabric of what makes a nation wealthy and strong.

The chances that your tombstone will read 'Killed by Asteroid' are about the same as they'd be for 'Killed in Airplane Crash.'

If Mars formed life, then life on Earth could have been seeded by life on Mars, making every life form on Earth descended from Martians.

The Earth is just one place of many that we could hang our hats.

If you don't question you're stuck within a pre-existing parameters of knowledge. Questions are what take you outside of those parameters.

A successful day for me is when I teach people something. They become enlightened by an idea and learn how to think about it, so that later on when someone says, "Tell me about x, y, z," they don't have to say, "I know this because Tyson told me." No, they'll say, "Here's why it's true because I know and understand it."

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