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Discovery ScienceWed 11 Nov · 14:00–15:00News & Documentary

Secrets Underground

Mystery Of The Serpent Mound

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About this programme

Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.

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Next episodes and editions

Future listings with the same programme title, excluding this episode.

Secrets UndergroundLegend Of The Nazi Gold · Discovery History · Tue 10 Nov, 09:00–10:00›Secrets UndergroundKing Solomon's Treasures · Discovery History · Tue 10 Nov, 10:00–11:00›Secrets UndergroundTesla's Final Secrets · Discovery History · Wed 11 Nov, 09:00–10:00›Secrets UndergroundDoomsday Volcano Mystery · Discovery History · Wed 11 Nov, 10:00–11:00›Secrets UndergroundAmerican Stonehenge · Discovery Science · Wed 11 Nov, 13:00–14:00›

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