Throughout the ancient world, structures were built to mirror the constellations in the night sky--and, in most cases, this is only apparent when they are viewed from high above the Earth. See more in Season 14, Episode 13, "The Constellation Code." Watch all new episodes of Ancient Aliens, ...

Through his thought experiments, Albert Einstein was able to tap into an advanced field of knowledge and enter altered states of consciousness - connecting him to the extraterrestrial world, in this clip from Season 5, "The Einstein Factor." Watch all new episodes of Ancient Aliens, Fridays at ...

In the 21st century, the search for extraterrestrial intelligence is ramping up like never before, with powerful new technologies allowing us to explore billions of stars across the universe. See more in this scene from Season 20, Episode 14, "The Search For Extraterrestrial Intelligence." ...

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, Fridays at 9/8c, and stay up to ...

Lurking in our oceans are creatures that defy explanation. See more in Season 14, Episode 5, "They Came from the Sea." 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. ...

Follow along as Georgio travels around the world to get to the bottom of historians most pressing questions. 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 ...

In this jaw-dropping video, we capture incredible footage of a UFO spotted in the Los Angeles sky! As rumors swirl about extraterrestrial life, we dive into the evidence that suggests aliens could be real. Witness the mysterious object as it glides effortlessly through the air, igniting ...

From mysterious encounters near New York's LaGuardia Airport to mind-blowing footage of UFOs hovering over military bases, each story is more incredible than the last. Prepare to have your mind blown as we dive into an extraordinary journey across America, uncovering so many alien and UFO ...

UFO Sightings Submitted by YOU! That's right, I'm going through my emails and checking out the UFO video you have all submitted! Even drawing out some more details! Thank you, remember that my contact email is at the bottom! These are some of the BEST UFO video you all submit to me, thank you ...

Within Tibetan Buddhism, one may hold the key to accessing alien realms through deep meditation - once in an enlightened state; interdimensional travel can take place , in this clip from Season 16, "The Lost Kingdom." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to ...

Did aliens from the tiny star Sirius B visit humans in the distant past, imparting the knowledge of civilization to peoples thousands of miles apart? See more in Season 14, Episode 4, "The Star Gods of Sirius." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on ...

Are these ancient stone structures actually harnessing energy from our planet? 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 ...