You know, dark matter matters.

Whenever people have used religious documents to make accurate predictions about our base knowledge of the physical world, they have been famously wrong.

You gotta be a good sport! So when I would lose, I would say, "That guy was better than I was; what do I have to do to be better next time?"

I would say - and paint doesn't peel unless it's acrylic paint, so maybe it is acrylic paint that they're using, not oil paint. So let me say yes, it would be acrylic house paint, which, when it dries, peels very nicely. So let's go with that.

The universe is almost 14 billion years old, and, wow! Life had no problem starting here on Earth! I think it would be inexcusably egocentric of us to suggest that we're alone in the universe.

The day that you stop looking - because you're content God did it - I don't need you in the lab. You're useless on the frontier of understanding the nature of the world.

To view space as, "Well, let's go to Mars now," or "Let's do this now," maybe we should rethink of space as our backyard and have a suite of launch vehicles that can enable any ambition a person has regarding space. It's the same way you can go to buy a car: I want to go offroading, I'll buy this model. I'm a city driver, that's this model. I want to use less fuel, well, that's this model. They're not selling you one car, you have options. So when I think of space, I think of having options.