Given how brainy and compelling the science fiction genre is — often depicting future scientific and technological advancements and serving as sharp satires — it is no wonder why it is among the most beloved in the film industry. Movies like Interstellar and 2001: A Space Odyssey have cemented an indestructible legacy through the years and gathered high spots among the best movies of all time. But where do these rank against other films in the genre in the judgment of Letterboxd users?