Foreign governments discover unidentified aerial phenomena in their skies, in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

Might the tools and technology of ancient builders have come from distant galaxies? See more in this scene from Season 3, Episode 6, "Aliens and Ancient Engineers." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY ...

Could paranormal activity be explained by beings entering our world from other dimensions? See more in Season 14, Episode 11, "The Trans-Dimensionals." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

The Mediterranean Sea has been dubbed the incubator of western civilization and Ancient Astronaut Theorists believe stories of giant being roaming the earth is proof of otherworldly visitors, in this clip from Season 15, "Giants of the Mediterranean." Watch all new episodes of Ancient Aliens, ...

Former police detective Dave Paulides investigates a mysterious disappearance at Mount Shasta, in this clip from Season 17, "The Mystery of Mount Shasta." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website ...

Considered by many to be the greatest civilization in the history of the Americas, the Maya thrived for more than 2,000 years. See more in this scene from Season 20, Episode 11, "Mysteries of the Maya." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of ...

Sealed vaults possessing a strange and deadly curse, mysterious relics believed to be under otherworldly protection, and riches so priceless, it has cost men their lives. See more in Season 7, Episode 4, "Treasures of the Gods." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and ...

New evidence is being discovered that completely upends our understanding of this ancient culture. See more in this scene from Season 20, Episode 11, "Mysteries of the Maya." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The ...

Legends of lost and mysterious islands, advanced civilizations and Eden-like paradises have been told by sailors throughout human history. See more in Season 6, Episode 9, "Aliens and Forbidden Islands." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of ...

The Pyramid of Khufu is an engineering marvel, but its origins remain unknown, leaving Theorists to believe otherworldly gods might've had a hand in its construction, in this clip from Season 5, "Secrets Of The Pyramids." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up ...

All around the world, archaeologists have uncovered mysterious relics revered by ancient cultures for thousands of years. See more in Season 6, Episode 8, "Mysterious Relics." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The ...

In Qumran, Israel, the extraordinary discovery of the Dead Sea scrolls leads to a shocking revelation regarding the biblical story of Noah, in this clip from Season 16, "The Forbidden Bible." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite ...