Space & Extraterrestrial Theories

The Dulce Base legend claims a multi-level, jointly-operated human-alien facility hides beneath Archuleta Mesa near Dulce, New Mexico, complete with genetic experiments, a 'Nightmare Hall,' and a 1979 firefight between aliens and human security. No physical evidence for any such base has ever surfaced. The story's documented origin is far stranger than the myth: a real U.S. Air Force disinformation campaign, run through AFOSI, that targeted Albuquerque businessman Paul Bennewitz and helped manufacture a modern UFO legend.

Robert Temple's 1976 book The Sirius Mystery claimed the Dogon people of Mali held impossible ancient knowledge of Sirius B, an invisible white-dwarf companion star with a ~50-year orbit, taught to them by amphibious extraterrestrials called the Nommo. The claim rests on 1930s-40s ethnography by Marcel Griaule and Germaine Dieterlen. But a 1991 field restudy by anthropologist Walter van Beek found Dogon informants did not actually hold the Sirius-B lore Griaule reported, Sirius B's existence and orbital period were already well known to Western science before Griaule arrived, and Carl Sagan and others argue the knowledge, if genuine, reached the Dogon through ordinary human contact.

Claims that governments run hidden breakaway space fleets or off-world bases.