Dinosaurs are extinct today because they lacked opposable thumbs and the brainpower to build a space program.

We're talking about a being whose very existence challenges our own sense of priority in the universe.

Dark matter and dark energy are two things we measure in the universe that are making things happen, and we have no idea what the cause is.

You ask people, do you pray to [a person or] God. If you say yes to that, you're religious by, presumably, anybody's standards of your conduct. And it's the yes to that question that applies to 40% of scientists. So, there're plenty of atheists who are scientists or not scientists. There maybe a conflict but many people in this country coexist in both worlds.

Any astrophysicist does not feel small looking up at the universe; we feel large.

In this 21st century, bedtime doesn't matter at all. All that matters is what you set for your DVR [Digital Video Recorder].

In five billion years, the sun will expand and engulf our orbit as the charred ember that was once Earth vaporizes. Have a nice day