"I don't think there's any such thing as a 'dumb question' when it comes to science. There are just questions that reveal a lack of information."

"The universe is not a toy. It's a laboratory."

"If you don't know how to think, you're a victim of those who do."

"You know, the universe is a pretty big place. If it's just us, seems like an awful waste of space."

"The greatest value of a human life is to ask questions."