"I often wonder if there are aliens out there who are watching us, and they're just shaking their heads, like, 'Look at these primitive beings, still fighting over land and resources.'"

"I'm not saying that science has all the answers. I'm saying that science is the only way we're going to get answers."

"I'm glad to be alive to see the universe unfold."

"I'm a big believer in the fact that if you're not making mistakes, you're not trying hard enough."

"I've never been able to get into science fiction as much as I'd like, because I find that most of it breaks the laws of physics."