Ancient Aliens: A Subterranean Network (Season 12, Episode 16) | History

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An ancient network of underground caves in modern-day Turkey were recently re-evidenced to be 10-to-12,000 years old – versus the originally thought 1500 years old – in this clip from Season 12, Episode 16, “Return to Gobekli Tepe”. #AncientAliens
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“Ancient Aliens” explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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