The best advice I was ever given was on my twenty-first birthday when my father said, Son, here's a million dollars. Don't lose it.

In general, I don't know when inspiration will pop up.

We should not have assumed that a political space station could be built.

I love superconductors.

How much intelligence does it take to sneak up on a leaf?

As for AIDS, it's a plague. We are human, we get plagues. They come along every so often, kill off two thirds of the population; in the next generation it's a quarter; after that it's a childhood disease.

I don't have a strong interest in history.