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Can Bones Reveal How Dogs Evolved from Wolves?

Can Bones Reveal How Dogs Evolved from Wolves?

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

Do Dogs Love Us or do They Just Want Treats?

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3:59
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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2:19
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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5:55
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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4:51
How the Immune System Fights Cancer

How the Immune System Fights Cancer

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2:49
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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6:48
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NOVA

How Earth’s Climate Changed Over the Past 500 Million Years

Over its history, Earth has fluctuated between two climate states: Icehouses, with ice caps at at least one of the poles, and Hothouses, when there is no ice at the poles.
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Beyond the Elements: Indestructible
53:30
Season 47 Episode 18
Beyond the Elements: Indestructible
Discover the fascinating chemistry that makes our world and everything in it—including us.
Beyond the Elements: Reactions
53:31
Season 47 Episode 17
Beyond the Elements: Reactions
Discover the fascinating chemistry that makes our world and everything in it—including us.
Can We Cool the Planet?
53:31
Season 47 Episode 16
Can We Cool the Planet?
Scientists look to geoengineering and other methods to cool the planet.
Nature's Fear Factor
53:21
Season 47 Episode 9
Nature's Fear Factor
Can bringing predators—and fear—back into an ecosystem help restore its natural balance?
Cat Tales
53:21
Season 47 Episode 3
Cat Tales
Goddess, demon, house pet? What does science say about the human relationship with cats?
Polar Extremes
1:52:46
Season 47 Episode 1
Polar Extremes
Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.
Decoding da Vinci
53:30
Season 46 Episode 21
Decoding da Vinci
Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
Why Bridges Collapse
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53:25
Season 46 Episode 18
Why Bridges Collapse
Can new engineering techniques help prevent deadly bridge collapses?
Rise of the Mammals
53:15
Season 46 Episode 17
Rise of the Mammals
Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
Back to the Moon
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53:32
Season 46 Episode 11
Back to the Moon
Discover why scientists and entrepreneurs alike have their sights set on the Moon again.
The Next Pompeii
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53:22
Season 46 Episode 6
The Next Pompeii
In the shadow of Vesuvius and Pompeii, a lesser-known volcano puts Naples at risk.
Rise of the Rockets
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53:34
Season 46 Episode 5
Rise of the Rockets
New technologies are promising a new renaissance in space travel.
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