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What "Ancient Aliens" 13-th episode about
Theorists explain how alien technology may be responsible for massive structures like the 3,000 megalithic stones in the French village of Carna, precision-cut blocks at Puma Punku in Peru and the Gobekli Tepe's 12,000-year-old circular structures.
Episode number: 13
Episode name: "Mysterious Structures"
Episode release date: 21 june 2014 at 01:00
Status: aired