Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Investigating how a crystal skull may hold more information than a supercomputer in this digital exclusive from Ancient Aliens. ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! There are geoglyphs around the world that Ancient Astronaut Theorists believe could have encoded alien messages in this clip ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! A look at how the Giza pyramids might have once functioned as a power plant in this digital exclusive from Ancient Aliens. ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Nikolai Tesla credited his many inventions to his ability to realize them entirely in his mind leading Ancient Astronaut ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! There is a mountain in western Tibet that Ancient Astronaut Theorists believe could be a nuclear power plant used by aliens as ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! There are quartz obelisks in Egypt that some Ancient Astronaut Theorists believe were used to transmit energy over vast ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Investigate the uniquely precise construction of the megalithic site of Puma Punku in this digital exclusive from Ancient ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Bolivia's stone blocks are so precise that Ancient Astronaut Theorists believe they could not have been built without advanced ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Giorgio talks with an engineer who built a prototype to back up his theory that Puma Punku's stone blocks were actually part of ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Investigate the possibility that the Incan Emporer Pachacutec and his greatest secrets are buried in a hidden chamber in Machu ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Finding the Ark of the Convenant could provide answers to ancient mysteries in the clip from Season 9, "Aliens and The Lost ...

In 1952 cameras spotted UFOs flying over the White House lawn in Washington D.C. - these sightings eventually lead to Project Blue Book, created by the U.S. government, in this clip from Season 5, "Aliens and Cover-Ups." Watch all new episodes of Ancient Aliens, returning soon, and stay up to ...