Skip to main content
Donate

Up Next

Can Bones Reveal How Dogs Evolved from Wolves?

Can Bones Reveal How Dogs Evolved from Wolves?

Video
5:12
Do Dogs Love Us or do They Just Want Treats?

Do Dogs Love Us or do They Just Want Treats?

Video
3:59
Are Cats More Expressive Than We Think?

Are Cats More Expressive Than We Think?

Video
2:51
Are Cats As Easy to Train as Dogs?

Are Cats As Easy to Train as Dogs?

Video
2:19
Can Sleep Quality and Quantity be Boosted Using Sound?

Can Sleep Quality and Quantity be Boosted Using Sound?

Video
3:03
How Sleep Helps Children Learn and Remember New Words

How Sleep Helps Children Learn and Remember New Words

Video
4:22
What We Know and Don’t Know about the Coronavirus

What We Know and Don’t Know about the Coronavirus

Video
5:55
How Coronavirus Tests Work

How Coronavirus Tests Work

Video
6:46
How the Immune System Fights Cancer

How the Immune System Fights Cancer

Video
2:49
An American Cancer Patient Receives Treatment in Cuba

An American Cancer Patient Receives Treatment in Cuba

Video
4:51
How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

Video
2:51
How the Hormone Leptin Helps Regulate Appetite

How the Hormone Leptin Helps Regulate Appetite

Video
6:48
Back to Show
NOVA

Why Are There Stone Tree Trunks in the Arctic?

Ellesmere Island, high in the Canadian Arctic, is only 800 miles from the North Pole. 50-million years ago, the treeless hillside would have been completely different.