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Ancient Maya Metropolis

Ancient Maya Metropolis

Season 48 Episode 22
53:31
Arctic Sinkholes

Arctic Sinkholes

Season 49 Episode 1
53:30
Great Mammoth Mystery

Great Mammoth Mystery

Season 49 Episode 3
53:16
Why Ships Crash

Why Ships Crash

Season 49 Episode 8
53:20
Ice Age Footprints

Ice Age Footprints

Season 49 Episode 9
53:43
Ending HIV in America

Ending HIV in America

Season 49 Episode 11
53:33
Saving Venice

Saving Venice

Season 49 Episode 12
53:31
Rebuilding Notre Dame

Rebuilding Notre Dame

Season 49 Episode 13
53:43
Computers v. Crime

Computers v. Crime

Season 49 Episode 14
53:30
Can Psychedelics Cure?

Can Psychedelics Cure?

Season 49 Episode 15
53:47
Ocean Invaders

Ocean Invaders

Season 49 Episode 16
53:32
Nazca Desert Mystery

Nazca Desert Mystery

Season 49 Episode 17
53:31
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NOVA

Alaskan Dinosaurs

Season 48 Episode 21

A team of intrepid paleontologists discovers that dinosaurs thrived in the unlikeliest of places—the cold and dark of winter in the Arctic Circle. How did they survive year-round and raise their young in frigid and dark winter conditions?

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