The search continues with new episodes of In Search Of Fridays at 10/9c! In an ancient shipwreck, archeologists discovered the oldest mechanical computer ever found. Ancient Astronaut Theorists suggest this may be evidence of alien communication with Ancient Greece in this scene from Season 10, ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Ancient Astronaut Theorists believe that crop circles could be attempts by extraterrestrials to communicate with humans. Discover what messages could be hidden in these geometric patterns in this clip from Season 10, ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Ancient Astronaut Theorists believe that Earth's Van Allen radiation belt could actually be advanced extraterrestrial technology designed to protect us from hostile alien weapons, in this scene from Season 10, "The Alien ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Are aliens using crop circles as a portal to travel through time? Ancient astronaut theorists say yes in this clip from Season 10, "Circles From the Sky". #AncientAliens Subscribe for more from Ancient Aliens and other ...

Stay up to date on all of HISTORY's latest premieres at http://history.com/schedule An ancient Babylonian story about three wise who were sent through a firey furnace leads ancient astronaut theorists to suggest there is a star gate in Iraq in this clip from Season 10, "The Forbidden Zones." ...