The ancient engravings in Val Camonica, Italy, depict possible extraterrestrial travel in this clip from Season 18, "Ancient Aliens On Location: Decoding The Alien Glyphs." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

The sacred temple complex of Angkor Wat is believed to have been constructed to replicate a star constellation, in this clip from Season 18, "Decoding the Dragon Gods." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists visit the most sacred temple in Egypt, The Temple of Edfu, in this clip from Season 18, "Ancient Aliens On Location: Decoding The Alien Glyphs." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

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: ...

Pentagon Reveals What Was Actually Captured On UFO Videos ► Subscribe: https://goo.gl/r5jd1F US military personnel in planes and ships often spot strange objects in the sky, and capture them on camera. But filming three different UFOs at once within 20 minutes is something unbelievable! In ...

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: ...