"We are stardust. We are golden. We are billion-year-old carbon. And we've got to get ourselves back to the garden."

"I find that if you have a goal, that you're going to work toward it. And if you don't have a goal, you're going to wander around aimlessly."

"I'm an educator. I'm a scientist. I'm a communicator. I'm not a politician."

"If you are scientifically literate, the world looks very different to you, and that difference, I think, is a difference for the better."

"The universe is a beautiful place, and it's full of wonders."