Ancient astronauts in popular culture

Ancient astronauts have been addressed frequently in science fiction and horror fiction.

Occurrences in the genres include: Anime and Manga Western Animation

Les Xipéhuz (1888) is a novella by the writing duo J.-H. Rosny—although it is possible that Rosny aîné was the principal contributor. It describes the fight that threatens humanity, in the beginning of its history, against a new form of intelligent non-organic life, the Xipéhuz, some sort of sentient crystals.