Ancient Astronaut Theorists explore the volcanic lava tubes in Pluto’s Cave, in this clip from Season 18, "Ancient Aliens On Location: Extraordinary Encounters." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT ...

Experts do some digging after someone reports receiving strange packages, in this clip from Ancient Aliens. #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 ...

Ancient Astronaut Theorists examine a strange Egyptian tomb complex located underground, 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: ...

An eyewitness makes a shocking discovery, in this The Proof Is Out Here clip. #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch more The Proof Is Out There on YouTube in this playlist: ...

Dr. Travis Taylor examines some mysterious Chilean UFO footage, 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 watch full ...

The team analyzes 3D models of the ranch, in this clip from Season 3, "Photo Finish." #TheSecretofSkinwalkerRanch Subscribe for more from The Secret of Skinwalker Ranch and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch more of The Secret of Skinwalker Ranch ...

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 ...

In this extraordinary documentary we meet people who have had real life UFO sightings, and caught them on camera too! Subscribe to Our Life: https://bit.ly/3dBMxvl This documentary argues that the mystery surrounding sightings of UFOs could be dispelled if governments were more open with their ...

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 ...