Even if you only want to write science fiction, you should also read mysteries, poetry, mainstream literature, history, biography, philosophy, and science. ↗
When I started in the business, there was a thing called adult fantasy, but nobody quite knew what it was, and most publishers didn't have an adult fantasy list. They had science fiction lists, which they stuck a little bit of fantasy into. ↗
I did one sci-fi movie. I did 'Gattaca.' I liked 'Gattaca' because that was always the kind of science fiction I really dug, the non-action oriented sci-fi. ↗
Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out. ↗