My first thought was always a cigarette. It still is, but I haven't cheated.

You can't really predict the future. All you can do is invent it.

I'm doing a book, 'Chasing Science,' about the pleasures of science as a spectator sport.

The big new development in my life is, when I turned 80, I decided I no longer have to do four pages a day. For me, it's like retiring.

A good science fiction story should be able to predict not the automobile but the traffic jam.

It's clear that science and science fiction have overlapping populations.

I did that for 40 years or more. I never had any writer's block. I got up in the morning, sat down at the typewriter - now, computer - lit up a cigarette.