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Check out some of these most shocking moon mysteries, in this Ancient Aliens compilation. New Season Fri., Feb. 7 at 9/8c; ...

Learn the secrets and ideas of Da Vinci in this compilation from Ancient Aliens. Watch your favorite episodes of Ancient Aliens on ...

Around the world and throughout history, people have reported seeing very similar types of unidentified objects in the sky.

Prepare to embark on episode 1 of a mind-bending journey as we delve into the intriguing world of extraterrestrials that share our ...

A new subterranean realm is discovered deep in the caves of Vietnam, in this clip from Season 18, "Secrets of Inner Earth." Watch ...

Are these people the descendants of star beings? See more in this compilation from Ancient Aliens. Watch all new episodes of ...

ufo caught on camera - most recent ufo Exclusive Footage: craziest ufo sightings: Super ufos caught on camers real alien ...

Of all the deleted and "missing" scenes of Aliens, one of the most fascinating is a moment where Bishop has a close-call with an ...

ufo caught on camera - most recent ufo Exclusive Footage: The message of space aliens To the people of the Earth part 4 real ...

Black Goo is alleged to be a self-organizing nanomaterial with extraterrestrial origins or classified military applications.

There have been long-standing rumors about the true source for the extraordinary technology that launched us to the moon, ...

What and where is the Xenomorph HOMEWORLD? - Alien Romulus Xenomorph Prime was the fourth planet orbiting the star ...

Check out these big alien invasions, in this Ancient Aliens compilation. New Season Fri., Feb. 7 at 9/8c; Stream Next Day, and stay ...

Ancient Astronaut Theorists believe that extraterrestrials might've been crucial to the construction of Nan Madol, in this clip from ...

Let's analyze secret alien codes. See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, ...

When we think about alien civilizations we tend to look into the vastness of space, to far away planets. But there is another ...

The largely unexplored continent of Antarctica has long been subject to rumors of UFOs, underground tunnel networks, and ...

The universe is unbelievably big – trillions of stars and even more planets. Soo… there just has to be life out there, right?

Civilizations need energy to expand. You've probably heard of the Kardashev scale, which classifies civilizations based on their ...

For more than four decades, award-winning journalist Linda Moulton Howe has covered the most mysterious phenomena on ...