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."

What do you call those knobby things on doors that help you open them?

Science, and its impact on a person's livelihood is the common denominator.

When I would lose matches, I fully respected the person who beat me, because they beat me. I can't blame anybody.

If you find life on Europa [Jupiter's moon], like, what would you call it? Would it be, like, Europeans?

My popularity does not derive from me pandering to people. People came to me. I don't tell anyone to follow me on Twitter. I don't tell people to like my Facebook page. I don't tell people to fill the venue. I'm offered to people, and then people come.

I don't see why there is no intelligent alien life in the universe.