Things get weird when paranormal radio host, Art Bell, receives strange metallic fragments in the mail in this clip from Season 18, "Ancient Aliens On Location: The UFO Investigations." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

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: ...

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: ...