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Can Bones Reveal How Dogs Evolved from Wolves?

Can Bones Reveal How Dogs Evolved from Wolves?

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Do Dogs Love Us or do They Just Want Treats?

Do Dogs Love Us or do They Just Want Treats?

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Are Cats More Expressive Than We Think?

Are Cats More Expressive Than We Think?

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

Are Cats As Easy to Train as Dogs?

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Can Sleep Quality and Quantity be Boosted Using Sound?

Can Sleep Quality and Quantity be Boosted Using Sound?

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

How Sleep Helps Children Learn and Remember New Words

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

What We Know and Don’t Know about the Coronavirus

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How Coronavirus Tests Work

How Coronavirus Tests Work

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6:46
An American Cancer Patient Receives Treatment in Cuba

An American Cancer Patient Receives Treatment in Cuba

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How the Immune System Fights Cancer

How the Immune System Fights Cancer

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How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

How Do Sumo Wrestlers Avoid Obesity-Related Diseases?

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How the Hormone Leptin Helps Regulate Appetite

How the Hormone Leptin Helps Regulate Appetite

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NOVA

Plant Fossils Hint at Arctic's Swampy Past

Paleontologist Kirk Johnson shows a group of high schoolers that plant species in Virginia used to be right at home near the North Pole.