"If aliens ever visit us, I think the outcome would be much as when Columbus landed in America, which didn't turn out very well for the Native Americans."

"For me, I am driven by two main philosophies: know more today about the world than I knew yesterday and lessen the suffering of others. You'd be surprised how far you can get with those two."

"I'm not a philosopher. I'm a scientist. I'm interested in what is, not what should be."

"The greatest discovery in science is the discovery of ignorance."

"The universe doesn't care about your feelings. It just is."