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NOVA

S40 Ep23: At the Edge of Space

Video duration: 52:52Expires: 12/15/15Video has closed captioning.

Can scientists unravel the mysterious phenomena that lurk between Earth and space?

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Gallery of Auroras

Gallery of Auroras

See spectacular images of the curtains of light that often grace dark skies near the North and South poles.

Lightning Varieties

Lightning Varieties

Your average jagged bolt is just one kind. There are also balls and elves, blue jets and red sprites, and m...

Northern Lights

Northern Lights

See a gallery of auroras above Earth and other planets, and hear the eerie sounds they make.

Space Storms

Space Storms

Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on ...

Episodes of NOVA41

Video thumbnail: NOVA S44 Ep7: Holocaust Escape Tunnel

NOVA

S44 Ep7: Holocaust Escape Tunnel

At ground zero for the final solution, scientists uncover a story of hope and bravery.

54:14

S44 Ep7: Holocaust Escape Tunnel

54:14

Video thumbnail: NOVA Treasures of the Earth: Power

NOVA

Treasures of the Earth: Power

Drill underground to see the treasures that power our world—today and into the future.

53:10

Treasures of the Earth: Power

53:10

Video thumbnail: NOVA Treasures of the Earth: Metals

NOVA

Treasures of the Earth: Metals

What is it about the nature of metals that have made them a pillar of human civilization?

53:40

Treasures of the Earth: Metals

53:40

Video thumbnail: NOVA Treasures of the Earth: Gems

NOVA

Treasures of the Earth: Gems

What processes in the depths of the Earth forge beautiful and precious stones?

53:40

Treasures of the Earth: Gems

53:40

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Clips of NOVA237

Video thumbnail: NOVA How to Find an Exoplanet

NOVA

How to Find an Exoplanet

Want to find another world beyond our solar system? Here are the 5 ways you can do it.

3:42

How to Find an Exoplanet

3:42

Video thumbnail: NOVA The Case for Eating Bugs

NOVA

The Case for Eating Bugs

Would you eat insects if it helped save the planet?

4:25

The Case for Eating Bugs

4:25

Video thumbnail: NOVA Grow Your Own Crystals

NOVA

Grow Your Own Crystals

What should you do with the borax you have leftover from making slime? Make crystals!

3:38

Grow Your Own Crystals

3:38

Video thumbnail: NOVA Scandal's Joe Morton on Flint

NOVA

Scandal's Joe Morton on Flint

Actor Joe Morton, narrator of “Poisoned Water,” discusses the Flint water crisis.

4:09

Scandal's Joe Morton on Flint

4:09

Video thumbnail: NOVA What Does Lead Do to the Brain?

NOVA

What Does Lead Do to the Brain?

How does lead poisoning damage the brain—and can we stop it?

5:21

What Does Lead Do to the Brain?

5:21

Video thumbnail: NOVA This Woman Helped Save Flint

NOVA

This Woman Helped Save Flint

LeeAnne Walters, of Flint, Michigan, helps save the city from a lead water crisis.

2:29

This Woman Helped Save Flint

2:29

Video thumbnail: NOVA WannaCry Cyberattack Explained

NOVA

WannaCry Cyberattack Explained

The WannaCry cyberattack cost the economy billions of dollars. Here's why that's scary.

1:56

WannaCry Cyberattack Explained

1:56

Video thumbnail: NOVA Meet the Gastric-Brooding Frog

NOVA

Meet the Gastric-Brooding Frog

These frogs barfed up their babies—and now scientists are trying to revive them.

5:29

Meet the Gastric-Brooding Frog

5:29

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Previews of NOVA177

Video thumbnail: NOVA Flint: A Timeline

NOVA

Flint: A Timeline

Follow the emergency in Flint from the switch in water supply to today’s health crisis.

1:55

Flint: A Timeline

1:55

Video thumbnail: NOVA S44 Ep9: Chinese Chariot Revealed Preview

NOVA

S44 Ep9: Chinese Chariot Revealed Preview

A team of experts rebuild an ancient battle chariot to help uncover its design secrets.

0:30

S44 Ep9: Chinese Chariot Revealed Preview

0:30

Video thumbnail: NOVA S44 Ep10: Poisoned Water Preview

NOVA

S44 Ep10: Poisoned Water Preview

What exactly went wrong in Flint—and what does it mean for the rest of the country?

0:30

S44 Ep10: Poisoned Water Preview

0:30

Video thumbnail: NOVA Holocaust Escape Tunnel Q&A with Historians and Filmmakers

NOVA

Holocaust Escape Tunnel Q&A with Historians and Filmmakers

At ground zero for the final solution, scientists uncover a story of hope and bravery.

2:00

Holocaust Escape Tunnel Q&A with Historians and Filmmakers

2:00

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