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Watch NASA's Unexplained Files Season 4 Episode 8 Online

  • 7/10
  • COUNTRIES: United States of America,United Kingdom,India
  • Subtitles: English

British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the ISS could poison its crew with ammonia gas. A startling image taken by a NASA probe points to evidence that life could exist on Mars.