Ancient astronauts (or ancient aliens) refers to a pseudoscientific set of beliefs, also called paleocontact, that hold that intelligent extraterrestrial beings (alien astronauts) visited Earth and made contact with humans in antiquity and prehistoric times. Proponents of the theory suggest that this contact influenced the development of modern ...

This is a list of alleged extraterrestrial beings that have been reported in close encounters, claimed or speculated to be associated with unidentified flying objects (UFOs) (not to be confused with the meaning of the term "alien species" in the biological science of ecology).

The Anunnaki (Sumerian: 𒀭𒀀𒉣𒈾, also transcribed as Anunaki, Annunaki, Anunna, Ananaki and other variations) are a group of deities of the ancient Sumerians, Akkadians, Assyrians and Babylonians. In the earliest Sumerian writings about them, which come from the Post-Akkadian period, the Anunnaki are deities in the pantheon, descendants...