"I'm often asked, 'What is the meaning of life?' I don't know, but I think that the search for meaning is a good meaning to have."

"My favorite color is the color of the universe, which is a kind of beige-white."

"I'm a big believer in the power of curiosity. It's what drives us to explore, to discover, to learn."

"I think the greatest gift you can give someone is the gift of knowledge."

"When you look at the universe, and you have no idea what it is, then you turn to superstition."