Do we know everything NASA knows about potential life in outer space? Check out this compilation from Ancient Aliens. 00:00 NASA’s Untold Extraterrestrial Encounter 05:02 NASA's Extraterrestrial Technology 10:02 Evidence of Alien Wars on Dwarf Planet 13:20 Is There Life on Mars? Watch all ...

Someone on a train in Italy catches a strange triangular group of lights out his window. Could it be a UFO? See more in this scene from Season 3, Episode 8, "Hook Island Monster, Skydiver's Plane Stall, and Somalia Freighter Phantom." Watch all your favorite episodes of The Proof Is Out There, ...

UFO sightings have been a topic of fascination and debate for decades. While many people dismiss UFO sightings as hoaxes or misidentified natural phenomena, others believe that these sightings are evidence of extraterrestrial life. In recent years, there has been an increase in reports of UFO ...

Are there really people from the stars? Do they have anything to do with the mysterious Phoenix lights sightings? See more in this clip from Season 4, Episode 5, "The Phoenix Lights Phenomenon." Watch all new episodes of History's Greatest Mysteries, returning Monday, January 30 at 9/8c, and ...

Why are there so many unanswered questions surrounding Atlantis? See more in this compilation from Ancient Aliens. 00:00- Atlantis on Antarctica 03:16- The Stone Connected with Underwater City 06:11- History between Greece and Ancient Civilization 12:51- Search for Lost City Watch all new ...

Stories of strange encounters accompany many of history's major events. Is it merely coincidence? Or might it be evidence of extraterrestrial intervention? See more in Season 8, Episode 4, "Alien Encounters." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The ...

A news broadcast captures a mysterious flying object in the sky during a California wildfire. See more in this scene from Season 1, Episode 4, "UFOs." Love watching The Proof Is Out There: Bermuda Triangle Edition? Stay up to date on all of your favorite The HISTORY Channel shows at ...

Billionaire establishes a grant for one of the largest studies of crop circles in history. See more in this scene from Season 19, Episode 2, "The Crop Circle Code." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at ...

Did civilization exist 12,000 years ago? See more in this scene from Season 19, Episode 3, "Mystery of the Lost Civilization." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for ...

The following are the top 5 instances of government cover-ups regarding alien activity. 00:00 The Navy, Nuclear Weapons and UFOs 04:15 Inexplicable Flying Objects 08:41 US Government Sees More than We Know 12:34 Project Blue Book Attempts to Prove UFO Phenomenon 16:47 The Roswell ...

On New Year's Eve, 1982, several witnesses claim they saw UFO's in the sky, in this scene from Season 19, Episode 1, "UFO Hotspots." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

These shocking UFOs have been spotted over some of the biggest cities in the U.S. See more in this compilation from The Proof is Out There. #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great shows from The UnXplained Zone: ...