Few genres are as widely celebrated and timeless as science fiction, with many films over the years making great strides in exploring the vast reaches of space, technology, and various other scientific concepts. The genre remains massively popular and influential in the modern era, as evidenced by Best Picture-winning films like Everything Everywhere All at Once and massive blockbusters like Dune: Part Two. Still, the genre wouldn't be where it is today without those pivotal, genre-defining titans that have been revered as classics of the medium.