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NOVA

Sinkholes—Buried Alive

Video duration: 53:10Video has closed captioning.

The catastrophic collapse of the ground beneath our feet is a growing worldwide hazard.

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Killer Landslides

Killer Landslides

Explore the forces behind deadly landslides—and the danger zones for the next big one.

Extreme Cave Diving

Extreme Cave Diving

A team of intrepid scientists journey into one of Earth's most dangerous and beautiful underwater frontiers.

How Caves Form

How Caves Form

Watch as rainwater, waves, lava, and bacteria create four different types of caves.

Episodes of NOVA41

Video thumbnail: NOVA Bombing Hitler's Supergun

NOVA

Bombing Hitler's Supergun

Discover how Allied forces conspired to destroy one of Hitler’s most diabolical weapons.

52:51

Bombing Hitler's Supergun

52:51

Video thumbnail: NOVA Operation Lighthouse Rescue

NOVA

Operation Lighthouse Rescue

Join engineers as they race to rescue a historic lighthouse from certain doom.

52:52

Operation Lighthouse Rescue

52:52

Video thumbnail: NOVA Can Alzheimer's Be Stopped?

NOVA

Can Alzheimer's Be Stopped?

Join investigators as they untangle the cause of Alzheimer’s and race to develop a cure.

52:51

Can Alzheimer's Be Stopped?

52:51

Video thumbnail: NOVA Inside Einstein's Mind

NOVA

Inside Einstein's Mind

Retrace the thought experiments that inspired his theory on the nature of reality.

53:07

Inside Einstein's Mind

53:07

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Clips of NOVA192

Video thumbnail: NOVA 3 Things "Faster Than Light"

NOVA

3 Things "Faster Than Light"

These three things have been said to go faster than light, but do they?

3:49

3 Things "Faster Than Light"

3:49

Video thumbnail: NOVA The Physics Behind Texting

NOVA

The Physics Behind Texting

When you send a text, how does your message make the journey to your friend’s phone?

3:37

The Physics Behind Texting

3:37

Video thumbnail: NOVA Saving the Montauk Lighthouse

NOVA

Saving the Montauk Lighthouse

A unique method to fight erosion saved the Montauk Point Lighthouse from disaster.

2:51

Saving the Montauk Lighthouse

2:51

Video thumbnail: NOVA Saving the Montauk Lighthouse

NOVA

Saving the Montauk Lighthouse

A unique method to fight erosion saved the Montauk Point Lighthouse from disaster.

2:51

Saving the Montauk Lighthouse

2:51

Video thumbnail: NOVA Gravity Changes Colors

NOVA

Gravity Changes Colors

This ingenious experiment proves that gravity changes the color of light all around us.

2:42

Gravity Changes Colors

2:42

Video thumbnail: NOVA Alzheimer's Clinical Trials

NOVA

Alzheimer's Clinical Trials

Real patients and families describe what it's like being in an Alzheimer's clinical trial.

4:30

Alzheimer's Clinical Trials

4:30

Video thumbnail: NOVA Alzheimer's Other Victims

NOVA

Alzheimer's Other Victims

Family members describe what it's like to have a loved one with Alzheimer's.

3:49

Alzheimer's Other Victims

3:49

Video thumbnail: NOVA Alzheimer's Virus-Like Protein

NOVA

Alzheimer's Virus-Like Protein

Tangles of a protein called tau inside neurons may be the culprit behind Alzheimer’s.

4:13

Alzheimer's Virus-Like Protein

4:13

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Previews of NOVA156

Video thumbnail: NOVA Bombing Hitler's Supergun Preview

NOVA

Bombing Hitler's Supergun Preview

Discover how Allied forces conspired to destroy one of Hitler’s most diabolical weapons.

0:30

Bombing Hitler's Supergun Preview

0:30

Video thumbnail: NOVA Operation Lighthouse Rescue Preview

NOVA

Operation Lighthouse Rescue Preview

Join engineers as they race to rescue a historic lighthouse from certain doom.

0:30

Operation Lighthouse Rescue Preview

0:30

Video thumbnail: NOVA Viking Unearthed Sneak Peek

NOVA

Viking Unearthed Sneak Peek

Uncover the truth behind the legendary Vikings and their epic journey to the Americas.

2:27

Viking Unearthed Sneak Peek

2:27

Video thumbnail: NOVA Vikings Unearthed Preview

NOVA

Vikings Unearthed Preview

Uncover the truth behind the legendary Vikings and their epic journey to the Americas.

0:30

Vikings Unearthed Preview

0:30

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