If you want to come behind the Bible and explain everything scientifically, then you're denying God's power over miracles.

Politics will take whatever shape it needs for people to get elected. But at the end of the day, the population remains and that's really, as an educator, who I care about.

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.

Space only becomes ordinary when the frontier is no longer being breached.

I have thoughts every day that are themselves tweets.

When Kennedy said, 'Let's go to the moon,' we didn't yet have a vehicle that wouldn't kill you on launch. He said we'll land a man on the moon in eight years and bring him back. That was an audacious goal to put forth in front of the American people.

The limits on your enlightenment come not from the age you stopped going to school but from the age you stopped being curious.