Theres two tiers of science fiction: the McDonalds sci-fi like Star Trek, where they have an adventure and solve it before the last commercial, and there are books that once youve read, you never look at the world the same way again.

Imagine yourself in the scene. See what there is to be seen. Listen to the sounds. Touch the world. Smell the air. Taste it. Use all of your senses. Then evoke those experiences for the reader. If you give the audience the flavor, they'll flesh out the moment in their own imaginations.

Doesn't anybody ever want to talk about anything else besides 'Star Trek?' There were 79 episodes of the series; there were 55 different writers. I was only one of them.

My approach to 'Star Trek' was, 'I know science fiction, and I know screen writing.' That was very arrogant of me, but you really need to be a little bit arrogant to think that what you have to say is good enough to justify the expense of hundreds of thousands - now millions of dollars - to make an episode of the TV show.

I had always been fascinated by the whole idea that Australia was this different ecology and that when rabbits and prickly pears and other things from Europe were introduced into Australia, they ran amok.

Who are we? And to me that's the essential question that's always been in science fiction. A lot of science fiction stories are - at their very best - evocations of that question. When we look up at the night sky and wonder, "Is there anyone else out there?" we're also asking who we are we in relation to them.

I have memories - but only a fool stores his past in the future.