Final answer:
Most science fiction stories present a world that never was and couldn't exist, speculating on a world that might be possible one day. These stories often explore futuristic settings and address important societal issues.
Step-by-step explanation:
Most science fiction stories present a world that never was and couldn't exist, speculating on a world that might be possible one day. These stories often explore futuristic settings, such as life on other planets, parallel worlds, or time travel. They can also comment on important societal issues and address the impact of scientific and technological developments on mankind.