Dive into the ultimate exploration of humanity's greatest mysteries! Are mass suicides and unholy rituals the result of extraterrestrial whispers? Could the legendary powers of ancient gods and today's super-heroes be rooted in alien technology? Find out in this full episode marathon of Ancient ...

Ancient astronaut theorists reveal the untold truths regarding Quetzalcoatl - the Mexican God. See more in this clip from Season 21, Episode 7, "Mysteries of the Aztecs." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Egyptian hieroglyphs depict the use of light bulbs in tombs and secret chambers. See more in Season 5, Episode 3, "Alien Power Plants." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

The Sumerians in ancient Mesopotamia achieved over one hundred "firsts" for human civilization. Advances in writing, agriculture, science, mathematics, medicine, astronomy, transportation, building, military, schools and city planning, all originated in Sumer. See more in this marathon from ...

Check out these epic doomsday theories. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The ...

Did aliens really help to shape our history? See more in this two hour marathon from Ancient Aliens. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and ...

Underneath a Mexican peninsula lies a secret Mayan Temple never spoken of before now. See more in this clip from Season 1, Episode 5, "Mysterious Underground Worlds." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Researchers in Chicago come to the conclusion that the sophistical of the human brain isn’t just a result of evolution. See more int his clip from Season 1, Episode 4, "Human Genesis." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Have extraterrestrial beings shaped our history? See more in this 2 hour marathon from Ancient Aliens. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens ...

The government reveals big secrets when they unveil their new UFO program. See more in this clip from Season 21, Episode 5, "The Top Ten Secret Projects." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

Researchers and theorists debate the origins of humans but make a shocking discovery. See more in this clip from Season 1, Episode 4, "Human Genesis." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

Check out these otherworldly discoveries. See more in this Ancient Aliens compilation. 1. Forbidden Caves 0:00 2. Underground Aliens 5:45 3. Forbidden Caves 2 12:05 4. Underground Aliens 2 Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website ...