Scientific inquiry shouldn't stop just because a reasonable explanation has apparently been found.

With ticket prices, do you ask yourself, why I'm paying $70 to see the arts? You say, "No, that's what the symphony is costing me."

The cosmic calendar is quite a fertile mode for communicating how small we are over time and space.

You get to say that the Earth is flat because we live in a country that guarantees your free speech. But it's not a country that guarantees that anything you say is correct.

We didn't go to the moon to explore or because it was in our DNA or because we're Americans. We went because we were at war and we felt a threat.

Why can't we summon the ingenuity and courage of the generations that came before us? The dinosaurs never saw that asteroid coming. What's our excuse?

Who you are, where you've been and what you've done is all up here, captured and preserved in your memories. If you lost that - the story of your own origins - you'd lose your identity, your sense of self.