Time Travelers Among Us? Exploring Ancient Theories | Ancient Aliens | History

This compilation explores the mind-bending theory that time travel may not only be possible—but that ancient civilizations may have already mastered it, leaving behind clues in sacred texts, artifacts, and unexplained encounters. See more in this Ancient Aliens compilation. Watch an all new season premiering Friday, August 29th at 9/8c. "Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

Courtesy of HISTORY on YouTube. Watch on YouTube ↗

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