Ancient Astronaut Theorists investigate a possible connection between Atlantis and Native American origin stories, in this clip from...

Former police detective Dave Paulides investigates a mysterious disappearance at Mount Shasta, in this clip from Season 17, "The Mystery...

Ancient Astronaut Theorists believe that the Rudston Monolith possesses unusual powers that spark strange phenomenon, in this clip from...

A strange monolith appears at the canyons in Utah, leaving people shocked and confused. Was this the work of extraterrestrials trying to...

A four-part docu-series from J.J. Abrams’ Bad Robot and Glen Zipper exploring our fascination with unidentified flying objects, and what...

Ancient petroglyphs in the Sierra Nevada Mountains depict footprints left by frightening packs of hairy man-like beasts. Now,...

Plato's account of the lost civilization of Atlantis causes controversy. Still, theorists believe its existence was real, and Atlanteans...