Aliens

Aliens are extraterrestrial creatures from unknown planets.
Background It is not known from what system and what planet they come from. Orbiting and observing the Earth with two motherships (Zeta and an unnamed one) at least since the 1600s in the Solar System, humans had no real awareness and no evidence of their existence. Before the 1960s, they were only believed by "crackpot" groups such as Quaere Verum, that believed in the existence of aliens and that they were being covered up by a government conspiracy.
But after the mysterious disappearance, or rather abduction, of the USSA space capsule Clarabella 7 and the pilot astronaut Colonel Hartigan during the 1960s Space Race, the existence of aliens became nationally recognized. It is said that alien technology was the basis of many of the Enclave's more exotic and impressive weaponry and robotics. Even toy manufacturers such as Wilson Atomatoys were not immune to these accusations and the United States government, which was said to keep its alien specimens and technology mostly in Area 51 (like a flying saucer that was after re-captured by aliens but crashed in California probably during the flight sometime after the Great War, instantly killing the two alien pilots).
The Brotherhood of Steel around 2161 and the Shi around 2241 encountered the bodies of aliens or their spaceships. By extension, the Capital Wasteland Brotherhood of Steel have a moderate amount of alien power cells kept in the Citadel's hidden armory and the Brotherhood Outcasts also have some alien power cells at Fort Independence. Also before 2277, an alien body was discovered in Fort Bannister, probably by the Enclave, carrying what may have been recovered (like an alien blaster and some alien power cells) in the armory of the mobile base crawler at Adams Air Force Base.
Some of the advanced human technologies were created by using the alien technology like the AI project number 59234, created in the 2050s who manages the entire Sierra Army Depot Skynet and (allegedly) the device blocking telepathic and psychic commands, the psychic nullifier.
Variations Alien