Ancient Aliens S2

Ancient Aliens S2 - EP10

Underground Aliens
42 Mins

By Toggle Video Published: 08 Jan 2016 Audio: English

If extraterrestrials influenced human history, can evidence of their existence be found in hidden tunnels and caverns around the world? Could a cave in Ecuador contain metallic books inscribed with secrets of alien technology? Was an ancient underground city in Turkey built with alien help... or as a refuge from an alien attack?

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