When we look out into space, we're looking back in time; the light from a galaxy a billion light-years away, for instance, will take a billion years to reach us. It's an amazing thing. The history is there for us to see. It's not mushed up like the geologic record of Earth. You can just see it exactly as it was.

When I won the MacArthur, I didn't receive a different amount of money than the men did.

I didn't know what kinds of questions to ask in mathematics. In physics, I could see there were things that were known and things that weren't.

A family living at the poverty level is unlikely to be able to afford a computer at home. Even with a computer, access to the Internet is another significant expense. A child might borrow a book from a public library; but it is not possible to take a computer home.

My dad was an actor and a writer; my mum was a drama teacher. My grandma was an actress. My aunt is an actress. My granddad was a cameraman. They would've been surprised if I wanted to be a dentist or something like that.

I guess I never grew up. I was still reading kids' books in high school and college. I was always interested in writing or illustrating children's books, and I started collecting out-of-print books when I was about 10 years old.

To go from working with a group of people in a sketch-comedy show on a small network, where it was all about just creating funny stuff, to being on a network show, and the pressures of that, and getting to know the new people who were involved in it. There was a learning curve for me. But it was an education.

First figure out why you want the students to learn the subject and what you want them to know, and the method will result more or less by common sense.