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Ancient Aliens · S21 E1

The Top Ten Extraordinary Discoveries

2025-02-07 · 42 min

Ancient Aliens is counting down ten of history's most astonishing discoveries; breakthroughs that challenge traditional beliefs about human history. From a lost city hidden in the Andes, to mysterious metal spheres that are not of this world and a sunken city that was said to be the home of the gods. Could these discoveries provide proof of extraterrestrial contact?

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Season 21 Episodes

  • E1The Top Ten Extraordinary Discoveries
  • E2The Top Ten Mysterious Monoliths
  • E3The Top Ten UFO Crashes
  • E4The Top Ten Unexplained Technologies
  • E5The Top Ten Secret Projects
  • E6The Top Ten Mysterious Mountains
  • E7Mysteries of the Aztecs
  • E8The Glowing Orb Phenomenon
  • E9The Legacy of J. Allen Hynek
  • E10The Volcano Factor
  • E11The Birdman Mystery
  • E12The Abduction Files
  • E13The Giants
  • E14Aliens In Our Midst
  • E15Britain's UFO Files
  • E16Mysteries Of The Norse Gods
  • E17Secrets of Japan
  • E18Episode 18
  • E19Episode 19
  • E20Episode 20