Secrets of the Underground: Mystery of the Serpent Mound
05:00 am - 06:00 am, Today on Science ()
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Mystery of the Serpent Mound
Season 1, Episode 2
Rob Nelson explores mysterious tunnels beneath Denver's airport and capitol building to investigate rumors of a secret organization operating below. In Ohio, he tries to uncover the ancient secrets of a mound shaped like a serpent.
repeat
2017
English
Stereo
Documentary
Science
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