These special compilation episodes of "Ancient Aliens" explore the controversial theory that extraterrestrials have visited Earth for millions of years.

Examining whether shadow people, spirits, poltergeists and other strange beings that have appeared in ancient texts and folklore could be otherworldly visitors that originate from unseen realms and ...

In space, no one can hear you scream, but they can sure hear you scratching your head as you try to make sense of the sprawling “Alien” universe. While Ridley Scott’s 1979 haunted-house-in-the-cosmos ...

Ancient Astronaut theorists have long proposed that Earth is an extraterrestrial laboratory. If so, does it extend beyond humans into the animal kingdom? Accounts of animalist gods can be found across ...