Ancient Astronaut Theorist, Georgio, takes a trip to Cairo, Egypt to check out a chamber discovered within the walls of the Great Pyramid.

A fascinating photo released to the public shows a UFO hovering over Stonehenge. See more in this clip from "Aliens and Unexplained Engineering."

Wondrous wizards... Mysterious sorcerers... And heavenly beings... possessed of unimaginable power. Throughout the ancient world, magic was used for everything from healing to communicating with the gods.

Researchers have discovered evidence of human DNA that might've mixed with extraterrestrials, see more in this clip from Season 1, "Ancient Aliens Special Presentation."

Reverence for the number three dates back thousands of years, and can still be found today in art, architecture, science, literature, and religion. What is it about this number that continues to fascinate mankind? Could this recurring motif contain a prof...

Ancient astronaut theorists travel to Honduras to check out stone statues that have an otherworldly connection, in this clip from Season 18, "Ancient Aliens On Location: Mysterious Artifacts."

Ancient Astronaut Theorists investigate Nomali statues and their connection to sky stones, in this clip from Season 18, "Ancient Aliens On Location: Mysterious Artifacts."