Am I about to feel really, really stupid?

My dignity and good television - they'll never meet.

I have some ideas on how to fix that. They're not very good ideas, but at least they're ideas!

I am incrementally a pessimist, but I see the international debate that Edward Snowden has engendered, and I think this is exactly where the discussion should be. So, I would say I'm more optimistic than pessimistic.

From earliest times, humans - explorers and thinkers - have wanted to figure out the shape of their world. Forever, the way we've done that is through storytelling. It is difficult to let the truth get in the way of a good story.

This is the point in the show where we say, 'Oh, what else do we have in the van that's flammable?'

The difference between screwing around and science is writing it down.