A group of airmen encounter a UFO from the future, in this clip from 18, "The Time Benders." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: ...

Ancient astronaut theorists believe a monument located in Honshu, Japan is linked to aliens, in this clip from Season 18, "Ancient Aliens On Location: Incredible Structures." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

The team conducts the biggest experiment ever performed on Skinwalker Ranch, in this clip from Season 3, "Closer Encounters." #TheSecretofSkinwalkerRanch Subscribe for more from The Secret of Skinwalker Ranch and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch ...

Ancient astronaut theorists that the giant stone structures located in Copan, Honduras tell a secret message, in this clip from Season 15, "The Mystery of the Stone Giants." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists believe strange shadow beings could've been produced from alien technology, in this clip from Season 18, "The Shadow People." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find ...

Scientists Detected New Alien Signals From Outer Space. The observable universe is approximately 92 billion light-years across, and it keeps growing faster and faster beyond human comprehension. Given that the universe is estimated to be 13.82 billion years old based on various measurements ...

These four UFO hoaxes were thought to be real, but later the truth was revealed, in this The Proof Is Out There compilation. 0:00 - Triangle Shaped UFO 3:28 - UFO Flies over Jerusalem 8:08 - Bright Light Cluster Miami UFO 12:21 - Duo of UFOs over England #TheProofIsOutThere Subscribe for ...

Ancient Astronaut Theorists believe that the colossal stone statues found in southern Egypt are transmitters for cosmic forces, in this clip from Season 15, "The Mystery of the Stone Giants." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

These Ancient Greek dragon homes were know to have otherworldly powers, in this clip from Season 18, "Decoding the Dragon Gods." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show ...

The team conducts an experiment to find out what’s beneath the mesa, in this clip from Season 3, "Dome of the Rock." #TheSecretofSkinwalkerRanch Subscribe for more from The Secret of Skinwalker Ranch and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch more of ...

UFO researcher had to halt his studies after being visited by strange entities, in this clip from Season 18, "The Shadow People." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show ...

An eyewitness in Chile encounters a mysterious UFO during a routine mission, in this clip from Season 15, "Destination Chile." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and ...