The future depicted in a good SF story ought to be in fact possible, or at least plausible. That means that the writer should be able to convince the reader (and himself) that the wonders he is describing really can come true... and that gets tricky when you take a good, hard look at the world around you.

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.

The science fiction method is dissection and reconstruction.

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

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

That's really what SF is all about, you know: the big reality that pervades the real world we live in: the reality of change. Science fiction is the very literature of change. In fact, it is the only such literature we have.

Science fiction is the very literature of change.