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

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.
Support Provided By
Decoding the Universe: Quantum
53:40
Season 51 Episode 14
Decoding the Universe: Quantum
Dive into the universe at the tiniest – and weirdest – of scales.
Solar System: Wandering Worlds
Unlock with PBS Passport
53:34
Season 51 Episode 13
Solar System: Wandering Worlds
Meet the surprising, oddball worlds moving around our solar system.
Solar System: Icy Worlds
Unlock with PBS Passport
53:34
Season 51 Episode 12
Solar System: Icy Worlds
Visit strange, frozen worlds to discover the bizarre ice that forms beyond Earth.
Solar System: Volcano Worlds
Unlock with PBS Passport
53:34
Season 51 Episode 11
Solar System: Volcano Worlds
Discover the powerful volcanic eruptions that have shaped worlds across our solar system.
Solar System: Strange Worlds
Unlock with PBS Passport
53:34
Season 51 Episode 10
Solar System: Strange Worlds
What are the weirdest worlds in our solar system, and how did they come to be?
Solar System: Storm Worlds
Unlock with PBS Passport
53:34
Season 51 Episode 9
Solar System: Storm Worlds
Discover the dramatic forces creating spectacular weather on neighboring planets and moons.
Decoding the Universe: Cosmos
53:38
Season 51 Episode 8
Decoding the Universe: Cosmos
Explore big discoveries that have revolutionized our understanding of the universe.
Secrets in Your Data
53:40
Season 51 Episode 7
Secrets in Your Data
Find out who’s using your data and what you can do about it.
Great American Eclipse
53:34
Season 51 Episode 6
Great American Eclipse
Explore the spectacular cosmic phenomenon of a total solar eclipse.
A.I. Revolution
53:30
Season 51 Episode 5
A.I. Revolution
Explore the promise and perils of new A.I. technologies.
Hunt for the Oldest DNA
53:10
Season 51 Episode 4
Hunt for the Oldest DNA
Follow the quest to recover DNA millions of years old for the very first time.
Building the Eiffel Tower
53:15
Season 51 Episode 3
Building the Eiffel Tower
Explore the engineering behind Paris’s iconic landmark, the tallest structure of its time.
Show more
Active loading indicator