"I'm an agnostic. I'm not an atheist, because I don't know enough to be an atheist."

"The best thing about being a scientist is that you get to ask 'why?' all the time."

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

"The universe is full of answers. You just have to know how to ask the questions."

"The universe is a hostile place. It will kill you if you're not careful."