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Ghosts of Machu Picchu

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Mind Over Money

Mind Over Money

Season 37 Episode 7
52:52
Deadliest Earthquakes

Deadliest Earthquakes

Season 38 Episode 1
53:05
Finding Life Beyond Earth

Finding Life Beyond Earth

Season 38 Episode 13
1:43:15
The Fabric of the Cosmos: What Is Space?

The Fabric of the Cosmos: What Is Space?

Season 38 Episode 16
53:40
The Fabric of the Cosmos: The Illusion of Time

The Fabric of the Cosmos: The Illusion of Time

Season 38 Episode 17
53:40
The Fabric of the Cosmos: Quantum Leap

The Fabric of the Cosmos: Quantum Leap

Season 38 Episode 18
53:40
The Fabric of the Cosmos: Universe or Multiverse?

The Fabric of the Cosmos: Universe or Multiverse?

Season 38 Episode 19
53:10
Hunting the Elements

Hunting the Elements

Season 39 Episode 6
1:53:49
Decoding Neanderthals

Decoding Neanderthals

Season 40 Episode 2
53:10
Building Pharaoh's Chariot

Building Pharaoh's Chariot

Season 40 Episode 5
52:52
Mind of a Rampage Killer

Mind of a Rampage Killer

Season 40 Episode 8
52:53
Manhunt—Boston Bombers

Manhunt—Boston Bombers

Season 40 Episode 14
53:10
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NOVA

Ghosts of Machu Picchu

Season 37 Episode 4

Why did the Incas abandon their city in the clouds?

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