Extras

Video thumbnail: NOVA How the Hormone Leptin Helps Regulate Appetite

NOVA

How the Hormone Leptin Helps Regulate Appetite

The discovery of leptin transformed our view of fat.

How the Hormone Leptin Helps Regulate Appetite

Video thumbnail: NOVA The Truth About Fat Prologue

NOVA

The Truth About Fat Prologue

Could it be that body fat has more to do with biological processes than personal choices?

The Truth About Fat Prologue

Video thumbnail: NOVA How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

NOVA

How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

It has to do with where the fat is distributed in their bodies.

How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

Video thumbnail: NOVA The Truth About Fat Preview

NOVA

The Truth About Fat Preview

Could it be that body fat has more to do with biological processes than personal choices?

The Truth About Fat Preview

Video thumbnail: NOVA Cuba's Cancer Hope Preview

NOVA

Cuba's Cancer Hope Preview

Can Cuba's innovative lung cancer vaccines give new hope to patients across the world?

Cuba's Cancer Hope Preview

Video thumbnail: NOVA How the Immune System Fights Cancer

NOVA

How the Immune System Fights Cancer

The battle begins as soon as healthy cells mutate into cancer cells.

How the Immune System Fights Cancer

Video thumbnail: NOVA Mysteries of Sleep Preview

NOVA

Mysteries of Sleep Preview

Why do we sleep? And what does sleep have to do with memory, trauma, and our emotions?

Mysteries of Sleep Preview

Video thumbnail: NOVA Cat Tales Preview

NOVA

Cat Tales Preview

Goddess, demon, house pet? What does science say about the human relationship with cats?

Cat Tales Preview

Video thumbnail: NOVA Are Cats More Expressive Than We Think?

NOVA

Are Cats More Expressive Than We Think?

Why it’s so hard to tell what your cat is thinking.

Are Cats More Expressive Than We Think?

Video thumbnail: NOVA Can Bones Reveal How Dogs Evolved from Wolves?

NOVA

Can Bones Reveal How Dogs Evolved from Wolves?

Learn more about the evolution of our furry companions.

Can Bones Reveal How Dogs Evolved from Wolves?

Video thumbnail: NOVA Dog Tales Preview

NOVA

Dog Tales Preview

Follow the epic journey of dog domestication and see what science says about dogs’ love.

Dog Tales Preview

Video thumbnail: NOVA Do Dogs Love Us or do They Just Want Treats?

NOVA

Do Dogs Love Us or do They Just Want Treats?

It's time to learn the truth once and for all.

Do Dogs Love Us or do They Just Want Treats?

Video thumbnail: NOVA How Climate Has Shifted Over Millions of Years

NOVA

How Climate Has Shifted Over Millions of Years

Lake mud from the Russian Arctic tells us that Earth's climate has oscillated in the past.

How Climate Has Shifted Over Millions of Years

Video thumbnail: NOVA What did the East Coast Look Like 3 Million Years Ago?

NOVA

What did the East Coast Look Like 3 Million Years Ago?

Scientists dig up ancient clams from the ocean 90 miles from the nearest beach.

What did the East Coast Look Like 3 Million Years Ago?

Video thumbnail: NOVA This Alaska Community is Losing Sea Ice to Climate Change

NOVA

This Alaska Community is Losing Sea Ice to Climate Change

See how one small town’s survival is threatened by climate change.

This Alaska Community is Losing Sea Ice to Climate Change

Video thumbnail: NOVA A Bird's-Eye View of Carbon Emissions

NOVA

A Bird's-Eye View of Carbon Emissions

What if carbon dioxide pollution were solid carbon chunks?

A Bird's-Eye View of Carbon Emissions

Video thumbnail: NOVA Polar Extremes Preview

NOVA

Polar Extremes Preview

Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.

Polar Extremes Preview

Video thumbnail: NOVA What if Carbon Left Your Tailpipe as Solid Chunks?

NOVA

What if Carbon Left Your Tailpipe as Solid Chunks?

Together, all the cars on Earth would leave quite the pile of carbon behind—every day.

What if Carbon Left Your Tailpipe as Solid Chunks?

Video thumbnail: NOVA Plant Fossils Hint at Arctic's Swampy Past

NOVA

Plant Fossils Hint at Arctic's Swampy Past

Learn more about a lush forest that once dominated the Arctic.

Plant Fossils Hint at Arctic's Swampy Past