NASA's Unexplained Files - Season 6 Episode 6 Secrets of the Alien Signals
- Genre : Documentary, Talk, Mystery
- Année : 2019
- Réalisateur :
- Acteur :
- Pays : United States of America, United Kingdom, India
- studio : Science
- When NASA begins a strange experiment to communicate with dolphins, experts investigate if it's a prelude to making alien contact. But some fear that such a discovery could have apocalyptic consequences.
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