Ancient Aliens: Season 2

2x04 Underground Aliens
TV-PG

  • 2010-11-19T02:00:00Z on History
  • 44m
  • United States
  • English
  • Documentary, Mystery, Fantasy, Science Fiction
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? Rumors of the U.S. military working alongside aliens in a secret base inside a mesa in New Mexico continue to swirl, Native American legends mention strange inner-Earth beings, and recent archaeological discoveries in the Yucatan may point to an extraterrestrial reality behind.
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