This mysterious interstellar object has been boggling scientist's minds. See more in this scene from Season 19, Episode 6, "Cosmic Impacts." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

How could these massive ancient structures have been made without the help of giants?! See more in Season 19, Episode 10, "The Giants of Malta." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

Many people believe that there are extraterrestrial reptilian humanoids that have been spotted on Earth. See more in this compilation from Ancient Aliens. 00:00 Reptilian-Human Hybrid 03:49 Reptilian Statues 10:23 Patient with Reptilian Heart Watch your favorite episodes of Ancient Aliens on ...

In many cultures, the power of the spoken word can activate energy in a talisman. See more in Season 19, Episode 18, "The Power of the Talisman." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...

This information about alien life on distant planets may surprise you. See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

The malfunction of U.S. nuclear missiles after a UFO encounter leaves the U.S. defenseless. Three former Air Force officers tell their story. Enjoy a free trial of National Geographic right here: ...

In 2008 in Stephenville, Texas a local pilot sees lights in the sky over his ranch coming from something huge. He is not alone: hundreds of people saw the craft, and a local reporter makes it her life’s work to tell their stories. From this classic encounter we head back several decades to the ...

Mysterious places can be found around the Earth, and, inexplicably, UFOs are often sighted near these mystical areas. See more in Season 2, Episode 1, "Mysterious Places." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

Ancient Astronaut Theorists have found compelling similarities between Mount Shasta and the Great Pyramid that explain the purpose they've served, in this clip from Season 17, "The Mystery of Mount Shasta." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all ...

Could the pyramids around the globe be somehow interconnected? See more in this scene from Season 2, Episode 11, "Extraterrestrial Pyramids." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Billions of dollars have been spent in our quest to find an "other Earth." See more in Season 10, Episode 6, "The Other Earth." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

In August of 2014, Russian cosmonauts aboard the International Space Station discovered something incredibly unexpected covering parts of the windows--living sea plankton. See more in Season 10, Episode 7, "Creatures of the Deep." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and ...