Extras

Video thumbnail: NOVA The Volcano Under Yellowstone

NOVA

The Volcano Under Yellowstone

A giant cauldron of magma simmering beneath Yellowstone is threatening to blow.

The Volcano Under Yellowstone

Video thumbnail: NOVA Towers of Chalk in Kansas

NOVA

Towers of Chalk in Kansas

Amidst the flat plains of Kansas are the gorgeous remains of an ancient inland sea.

Towers of Chalk in Kansas

Video thumbnail: NOVA A Labyrinth of Lava

NOVA

A Labyrinth of Lava

The big island of Hawaii is shot through with an underground labyrinth carved out by lava.

A Labyrinth of Lava

Video thumbnail: NOVA Animal Mummies Preview

NOVA

Animal Mummies Preview

How and why did the ancient Egyptians mummify their pets and other creatures?

Animal Mummies Preview

Video thumbnail: NOVA Sea Level Rise: When 1 in = 2 ft

NOVA

Sea Level Rise: When 1 in = 2 ft

Sea levels will rise by the same amount all over the world, right? Wrong. Here’s why.

Sea Level Rise: When 1 in = 2 ft

Video thumbnail: NOVA Digital Domain of Warfare

NOVA

Digital Domain of Warfare

The Internet has become a battleground, and we need to protect ourselves.

Digital Domain of Warfare

Video thumbnail: NOVA CyberWar Threat Preview

NOVA

CyberWar Threat Preview

As internet connections multiply so do points of attack and risks to national security.

CyberWar Threat Preview

Video thumbnail: NOVA The Power of the Flood Myth

NOVA

The Power of the Flood Myth

Scientists scour a marsh in the Middle East for signs of periodic Mesopotamian flooding.

The Power of the Flood Myth

Video thumbnail: NOVA Space Pics That Amaze Scientists

NOVA

Space Pics That Amaze Scientists

We asked scientists, “What are your favorite images from space?” Here’s what they said.

Space Pics That Amaze Scientists

Video thumbnail: NOVA Ghosts of Subatomic Particles

NOVA

Ghosts of Subatomic Particles

The universe’s smallest particles fly down from space and emit from a radioactive rod.

Ghosts of Subatomic Particles

Video thumbnail: NOVA Invisible Universe Revealed Preview

NOVA

Invisible Universe Revealed Preview

Follow the historic rescue of Hubble—the space telescope that unveiled the cosmos.

Invisible Universe Revealed Preview

Video thumbnail: NOVA Einstein’s Thought Experiment

NOVA

Einstein’s Thought Experiment

Your perception of time depends on how you are moving.

Einstein’s Thought Experiment

Video thumbnail: NOVA Gravity's Effect on Spacetime

NOVA

Gravity's Effect on Spacetime

Einstein's theory showed that time itself is affected by gravity.

Gravity's Effect on Spacetime

Video thumbnail: NOVA What is Spacetime?

NOVA

What is Spacetime?

A mysterious concept changed the way we understand reality.

What is Spacetime?

Video thumbnail: NOVA Inside Einstein's Mind Preview

NOVA

Inside Einstein's Mind Preview

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

Inside Einstein's Mind Preview

Video thumbnail: NOVA North American Gold

NOVA

North American Gold

When the Earth formed, most of the gold sunk to its core—but some remained trapped inside

North American Gold

Video thumbnail: NOVA Making North America: Human Preview

NOVA

Making North America: Human Preview

How has the land shaped our lives, from the arrival of the first Americans up until today?

Making North America: Human Preview

Video thumbnail: NOVA These Boulders are Alive

NOVA

These Boulders are Alive

Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.

These Boulders are Alive

Video thumbnail: NOVA How Panama Changed the World

NOVA

How Panama Changed the World

Two scientists scan islands off Panama for clues to determine how the country was formed.

How Panama Changed the World

Video thumbnail: NOVA Making North America: Life Preview

NOVA

Making North America: Life Preview

How did massive volcanic eruptions, inland seas, and land bridges pave the way for life?

Making North America: Life Preview

Video thumbnail: NOVA Secrets of the Ghost Forest

NOVA

Secrets of the Ghost Forest

Meet the earthquake that drowned the Pacific Northwest.

Secrets of the Ghost Forest

Video thumbnail: NOVA Making North America: Origins Preview

NOVA

Making North America: Origins Preview

Experience the colossal geologic forces that shaped our continent over 3 billion years.

Making North America: Origins Preview

Video thumbnail: NOVA Time Travel in the Grand Canyon

NOVA

Time Travel in the Grand Canyon

What does this geological wonder reveal about North America’s deep history?

Time Travel in the Grand Canyon

Video thumbnail: NOVA Making North America Sneak Peek

NOVA

Making North America Sneak Peek

Host Kirk Johnson explores how the continent was shaped—and how it shaped us.

Making North America Sneak Peek