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Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age.

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Full Episodes
Season
When Mammals Only Went Out At Night
Episode
11:09
Eons

When Mammals Only Went Out At Night

Scientists discover dinosaurs and tiny mammals' sleep habits are different than thought.
Season 4 Episode 10
How a Mass Extinction Event Created the Amazon
Episode
7:55
Eons

How a Mass Extinction Event Created the Amazon

The history of how the Amazon's revolution began in just one day.
Season 4 Episode 9
How a Supervolcano Ignited an Evolutionary Debate
Episode
9:59
Eons

How a Supervolcano Ignited an Evolutionary Debate

Discover the effects of the Toba supervolcano.
Season 4 Episode 8
How Pollination Got Going Twice
Episode
9:32
Eons

How Pollination Got Going Twice

Pollination by insects actually got going twice.
Season 4 Episode 7
The Creature That Stumped Darwin
Episode
6:46
Eons

The Creature That Stumped Darwin

The Toxodon fossils help reveal the mystery surrounding evolution.
Season 4 Episode 6
How the Starfish Got Its Arms
Episode
10:53
Eons

How the Starfish Got Its Arms

The Story of How the Starfish Got its Arms Reminds us that Animals have Deep Histories.
Season 4 Episode 5
Where Are All the Medium-Sized Dinosaurs?
Episode
11:01
Eons

Where Are All the Medium-Sized Dinosaurs?

Learn More about the Very Rare Medium-Sized Dinosaurs.
Season 4 Episode 4
The Island of the Last Surviving Mammoths
Episode
8:06
Eons

The Island of the Last Surviving Mammoths

The very last mammoths that ever lived experienced what’s known as a mutational meltdown.
Season 4 Episode 3
The Traits That Spawned the Age of Mammals
Episode
7:44
Eons

The Traits That Spawned the Age of Mammals

Some Mammal Traits Show Up a Lot Earlier and in Things That Weren’t Mammals at All.
Season 4 Episode 2
Did These Giant Sloths Poop Themselves to Death?
Episode
10:01
Eons

Did These Giant Sloths Poop Themselves to Death?

Find out if Sloths Really Did Poop Themselves to Death.
Season 4 Episode 1
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Science & Nature
Episode 2
Watchwith PBS Passport
48:03
A World Without NASA

Episode 2

Season 1 Episode 102
Episode 1
Watchwith PBS Passport
48:03
A World Without NASA

Episode 1

Season 1 Episode 101