The Universe is under no obligation to make sense to you.

When students cheat on exams, it's because our school system values grades more than students value learning.

I want to create the airplane that flies in the rarified atmosphere of Mars. This is what galvanizes a generation to want to become scientists and engineers in the first place, not we need a scientist to develop a plane that's 20 percent more fuel-efficient than the one your parents flew.

No one is dumb who is curious. The people who don't ask questions remain clueless throughout their lives.

It is astonishing to realize that until Galileo performed his experiments on the acceleration of gravity in the early seventeenth century, nobody questioned Aristotle's falling balls. Nobody said, Show Me!

It's quite literally true that we are star dust, in the highest exalted way one can use that phrase. ...I bask in the majesty of the cosmos. I use words, compose sentences that sound like the sentences I hear out of people that had revelation of Jesus, who go on their pilgrimages to Mecca.

Today, in this, the 21st century, bedtime doesn't matter at all. All that matters is what you set for your DVR.