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4:00 AM: Secrets Of The Underground (S1 E1) (S1) | Discovery Science | 8/28 2025 Discovery Science
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Secrets Of The Underground « at 4:00 AM on Discovery Science

Episode 1

Broadcast info
Published: 2017
Episode: American Stonehenge

Rob Nelson investigates the mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge. Plus, the search for escape tunnels in Alcatraz.

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