Villains from Science-Fiction (Sci-Fi for short) genre works - science-fiction is based on scientifically-possible worlds or settings without the use of fantastical elements such as magic or the supernatural : however as the genre evolved it grew many subgenres and sometimes the line between science-fiction and fantasy blurred.. thus there is "hard" sci-fi (which focuses on the scientifically probable), "soft" sci-fi (which employs less probable or outdated scientific themes) and science-fantasy (in which science is merged with fantasy, often to the point is is considered a twin-genre of *both* science fiction and fantasy).