Are these ancient stone structures actually harnessing energy from our planet? See more 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 ...

For thousands of years, humankind has attempted to make contact with beings from beyond Earth. See more in this scene from Season 20, Episode 14, "The Search For Extraterrestrial Intelligence." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your ...

The native Hawaiians trace their ancestry to beings from the Pleiades star system called the Akua. See more in Season 14, Episode 12, "Islands of Fire." 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 ...

Might the tools and technology of ancient builders have come from distant galaxies? Find out more in this clip 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 ...

Are extraterrestrials altering human DNA and repopulating the Earth with alien/human hybrids? See more in Season 14, Episode 10, "Project Hybrid." 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 ...

Ancient myths of small gray beings with black oval eyes are uncovered. See more in this marathon 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. ...

Could an exotic super heavy element provide the key to humanity's future in the stars? See more in Season 14, Episode 3, "Element 115." 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 ...

In this video, we delve into one of the most compelling UFO sightings ever captured on camera—the mysterious Turkey UFO incident recorded by Yalcin Yalman. Between 2007 and 2009, Yalman, a night watchman stationed near the Sea of Marmara, filmed a series of unexplained objects hovering over the ...

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, ...