Comics:

Frustration with censorship and editorial interference led to a group of Pilote cartoonists to found the adults-only L'Echo des savanes in 1972. Adult-oriented and experimental comics flourished in the 1970s, such as in the experimental science fiction of Mbius and others in Metal hurlant, even mainstream publishers took to publishing prestige-format adult comics.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Metal hurlant wasn't of what genre?
unanswerable