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Ancient Aliens · S22 E4

Extraterrestrial Engineering

2026-02-05 · 42 min

Host Giorgio Tsoukalos probes the series archives to explore remarkable ancient structures that defy conventional explanation. From the precisely cut stone blocks at Puma Punku, to the gigantic temples of Malta, and the megalithic city of Nan Madol, could these mysterious sites contain evidence of extraterrestrial contact in the distant past?

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Season 22 Episodes

  • E1Skulls of the Gods
  • E2Egypt's Lost Pyramids
  • E3Island of the Gods
  • E4Extraterrestrial Engineering
  • E5UFO Hot Spots
  • E6Mysterious Monuments
  • E7Underwater Alien Bases
  • E8Secrets of the Vedas
  • E9Wars of the Gods
  • E10UFO Sightings
  • E11Alien A.I.
  • E12Hidden Messages
  • E13Secrets of the Amazon