At the Mountains of Madness is a novella by horror writer H. P. Lovecraft, written in February/March 1931 and rejected that year by Weird Tales editor Farnsworth Wright on the grounds of its length. It was originally serialized in the February, March and April 1936 issues of Astounding Stories. It has been reproduced in numerous collections. The story details the events of a disastrous expedition to the Antarctic continent in September of 1930 and what was found there by the explorers, which the narrator describes in the hope of deterring another planned expedition to return to the continent. The story has inadvertently popularized the concept of ancient astronauts, as well as Antarctica’s place in the “ancient astronaut mythology”.