A television advertisement must illustrate the scientific method to substantiate any claim.... That is why stains are lifted, ring-around-the-collar is removed, paper towels become soaked, excess stomach acid is absorbed, and headaches go away-all during the commercial.

I'd go back and hang out with Isaac Newton. I'm torn between do I hang out with him or do I bring him into the present to hang out with me. See, that might be terrifying because his head will just explode once he sees everything that was derived from his discoveries, but I'd spend more time with someone who I think is one of the most brilliant minds our species has ever known.

The universe's destiny has very little to do with the near-term destiny of Earth.

Any time we are answer-driven rather than idea driven, we have lost the true meaning of education.

A supernova is one of the most powerful explosions in the universe. It's so luminous, it can be seen across billions of light years. It releases as much energy in an instant as our sun will produce over its 10-billion-year lifetime.

If each dead person became a ghost, there'd be more than 100 billion of them haunting us all. Creepy, but cool.

That's the point, to get the people who wouldn't otherwise think to eavesdrop on a conversation that involves science.