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2 Temporada
16 Episodio
Secrets of the Underground - Season 1 Episode 3 Episodio 3
Rob Nelson hunts for a legendary mass grave that could expose a dark secret of America's industrial past. High in the mountains, a giant lake is mysteriously disappearing, and Rob uses cutting-edge technology to find out why.
- Año: 2017
- País: United States of America
- Género: Reality, Documentary
- Estudio: Science
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