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2:00 PM: Secrets Of The Underground (S1 E2) (S1) | Discovery Science | 8/20 2025 Discovery Science
2:00 PM - 3:00 PM
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Secrets Of The Underground « at 2:00 PM on Discovery Science

Episode 2

Broadcast info
Published: 2017
Episode: Mystery Of The Serpent Mound

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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Secrets Of The Underground
Secrets Of The Underground (S1 E1)
American Stonehenge
20 Aug 1:00 PM - 2:00 PM | Discovery Science
13:00: Secrets Of The Underground (S1 E1) (Discovery Science)
Discovery Science
Secrets Of The Underground
Secrets Of The Underground (S1 E2)
Mystery Of The Serpent Mound
20 Aug 2:00 PM - 3:00 PM | Discovery Science
14:00: Secrets Of The Underground (S1 E2) (Discovery Science)
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How Do They Do It? (S16 E8)
8:30 PM

How Do They Do It? ...

How Do They Do It? (S16 E8)
9:00 PM

How It's Made (S26 E10)

How It's Made (S26 E10)
9:30 PM

How It's Made (S26 E11)

How It's Made (S26 E11)
10:00 PM

How It's Made (S26 E12)

How It's Made (S26 E12)
10:30 PM

How It's Made (S26 E13)

How It's Made (S26 E13)
11:00 PM

How It's Made: Dream Cars (S2 E9)

How It's Made: Dream Cars (S2 E9)
11:30 PM

How It's Made: Dream Cars (S2 E10)

How It's Made: Dream Cars (S2 E10)
12:00 AM

How It's Made: Dream Cars (S2 E11)

How It's Made: Dream Cars (S2 E11)
12:30 AM

How It's Made: Dream Cars (S2 E12)

How It's Made: Dream Cars (S2 E12)
1:00 AM

Morgan Freeman's Through The Wormhole (S7 E8)

Morgan Freeman's Through The Wormhole (S7 E8)
2:00 AM

How the Universe Works (S5 E1)

How the Universe Works (S5 E1)
4:00 AM

Blowing Up History (S4 E27)

Blowing Up History (S4 E27)
5:00 AM

Blowing Up History (S4 E28)

Blowing Up History (S4 E28)

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