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What Are UFOs?

What Are UFOs?

Season 52 Episode 1
53:43
Extreme Airport Engineering

Extreme Airport Engineering

Season 52 Episode 2
53:40
Dino Birds

Dino Birds

Season 52 Episode 3
53:40
Egypt's Tombs of Amun

Egypt's Tombs of Amun

Season 52 Episode 4
53:40
Pompeii's Secret Underworld

Pompeii's Secret Underworld

Season 52 Episode 5
53:40
Baltimore Bridge Collapse

Baltimore Bridge Collapse

Season 52 Episode 6
53:32
Revolutionary War Weapons

Revolutionary War Weapons

Season 52 Episode 7
53:39
Secrets of the Forest

Secrets of the Forest

Season 52 Episode 8
53:41
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NOVA

Nazi Attack on America Preview

Long before 9/11, a far deadlier, little-known attack from the ocean depths struck our shores, lasting three-and-a-half years and claiming 5,000 lives. Now, famed undersea explorer Bob Ballard, discoverer of the Titanic, investigates the wreck of one of the attack craft, a German submarine that lies at the bottom of the gulf just a few miles off New Orleans.

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Season
Ultimate Crash Test: Countdown
53:29
A first-of-its-kind experiment aims to stage a multi-vehicle pileup to gain new data on car safety.
Critical Condition: Health in Black America
1:36:42
After centuries of pseudoscience, researchers examine the causes of racial health disparities.
Secrets of the Forest
53:41
Follow scientists in a quest to understand how complex forest ecosystems can help cool our planet.
Revolutionary War Weapons
53:39
Explore key military technologies in the American colonies’ fight for freedom.
Baltimore Bridge Collapse
53:32
Follow the investigation into the deadly container ship collision that closed the Port of Baltimore.
Pompeii's Secret Underworld
Unlock with PBS Passport
53:40
Archaeologists uncover new truths about Pompeii, a wealthy Roman playground with dark secrets.
Egypt's Tombs of Amun
Unlock with PBS Passport
53:40
A long-lost ancient cemetery opens the door to a unique period in Egyptian history.
Dino Birds
53:40
Fossils reveal how birds survived the killer asteroid and became today’s only living dinosaurs.
Extreme Airport Engineering
Unlock with PBS Passport
53:40
Follow the race to build a world-class airport on the site of one of America’s busiest flying hubs.
What Are UFOs?
Unlock with PBS Passport
53:43
Can science reveal the secrets of mysterious objects seen in our skies?
Lost Tombs of Notre Dame
53:40
Mysterious bodies are found under one of the world’s most famous cathedrals.
Building Stuff: Change It!
53:40
From electric flight to artificial noses, engineers are finding new ways to preserve our planet.
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