PBS Anywhere

Providing Support for PBS.org

NOVA

Oklahoma's Deadliest Tornadoes

53:06Expires: 12/15/15

Hear harrowing stories from survivors of Moore’s massive tornado and meet scientists who stalk these ferocious storms.

Learn More

Hunt for the Supertwister

Hunt for the Supertwister

Tornado-chasing scientists with an eye to better forecasting risk their lives to plumb the secrets of natur...

Rate Tornado Damage

Rate Tornado Damage

Use the Fujita Scale of tornado intensity to assess the level of destruction left in the wake of actual tor...

Tornado Country

Tornado Country

How is it that with nearly 200 nations in the world, just one—the U.S.—gets up to three-quarters of all tor...

Killer Tornado of 1928

Killer Tornado of 1928

The remarkable story of 17-year-old Dale Larson and 29 Nebraskan schoolchildren shows how far tornado warni...

Episodes of NOVA41

Video thumbnail: NOVA Wild Ways

NOVA

Wild Ways

Explore how newly established wildlife corridors offer hope to endangered species.

53:22

Wild Ways

53:22

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 Vikings Unearthed

NOVA

Vikings Unearthed

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

1:52:52

Vikings Unearthed

1:52:52

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

See all Episodes

Clips of NOVA188

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

Video thumbnail: NOVA Inside the Mind of Alzheimer’s

NOVA

Inside the Mind of Alzheimer’s

Journalist Greg O'Brien gives a first-hand account of what it's like have Alzheimer's.

4:23

Inside the Mind of Alzheimer’s

4:23

Video thumbnail: NOVA Predicting Alzheimer’s

NOVA

Predicting Alzheimer’s

Certain gene forms increase your risk of developing Alzheimer's.

2:38

Predicting Alzheimer’s

2:38

Video thumbnail: NOVA David Lynch x Robots = A.I. Art

NOVA

David Lynch x Robots = A.I. Art

David Lynch puts a literal face on the oddest collection of little learning robots.

2:11

David Lynch x Robots = A.I. Art

2:11

Video thumbnail: NOVA Ötzi the Iceman's Ax

NOVA

Ötzi the Iceman's Ax

How did Ötzi the Iceman, who lived 5300 years ago, sharpen his ax?

1:48

Ötzi the Iceman's Ax

1:48

See all

Previews of NOVA154

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

Video thumbnail: NOVA Wild Ways Preview

NOVA

Wild Ways Preview

Explore how newly established wildlife corridors offer hope to endangered species.

0:30

Wild Ways Preview

0:30

Video thumbnail: NOVA Can Alzheimer's Be Stopped? Preview

NOVA

Can Alzheimer's Be Stopped? Preview

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

0:30

Can Alzheimer's Be Stopped? Preview

0:30

See all