I'd hate to die twice. It's so boring.

The world is a dynamic mess of jiggling things

There is enough energy in a single cubic meter of space to boil all the oceans in the world.

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."

All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.

I would rather have questions that can't be answered than answers that can't be questioned.

Science is a way to teach how something gets to be known, what is not known, to what extent things are known (for nothing is known absolutely), how to handle doubt and uncertainty, what the rules of evidence are, how to think about things so that judgments can be made, how to distinguish truth from fraud, and from show.