Ancient Aliens: Secrets of the Pyramid

For thousands of years, pyramids were the largest structures on Earth. See more in Season 5, Episode 1, "Secrets of the Pyramids." "Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years. The HISTORY® Channel, a division of A+E Global Media, is the premier destination for historical storytelling.

Courtesy of History on YouTube. Watch on YouTube ↗

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