Researchers discover a massive underground city that hold hundreds of people. See more in Season 21, Episode 1, "The Top Ten Extraordinary Discoveries." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...
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Who are the beings with big heads and giant eyes that seem to have been visiting our planet for millennia? Known by researchers as the "greys," these mysterious beings have been depicted in rock-art and carved stone figures throughout the ages and all over the world. See more in Season 2, ...
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Check out these out of this world alien theories. See more in this Ancient Aliens marathon. 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 ...
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Check out these mysterious moon theories. See more in this Ancient Aliens compilation. Ch1 - 0:00 Ch2 - 17:08 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 ...
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Check out these alien theories from the stars. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for ...
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Check out these out of this world theories! See more in this Ancient Aliens Marathon. Watch all new episodes Fridays 9/8c; Stream Next Day, 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 ...
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Check out these mysterious messages hidden in the stars. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...
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There are those who believe that embedded in our most sacred religious texts, as well as in the design and location of ancient monuments, are secret messages--messages that may reveal the purpose behind our very existence. Could it be true? See more in Season 9, Episode 7, "Alien Messages." ...
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A nighttime raid during WWII reveals strange red lights that suddenly disappear. See more in this clip from Season 21, Episode 8, "The Glowing Orb Phenomenon." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website ...
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Check out these hidden alien bases. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, 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 ...
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Ancient alien theorists reveal secret codes various civilizations have been using. See more in this Ancient Aliens marathon. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...
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Ancient astronaut theorists believe there was an otherworldly presence inhabiting these mysterious sites. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...
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