All Episodes

When Mammals Only Went Out At Night

Scientists discover dinosaurs and tiny mammals' sleep habits are different than thought.

How a Mass Extinction Event Created the Amazon

The history of how the Amazon's revolution began in just one day.

How a Supervolcano Ignited an Evolutionary Debate

Discover the effects of the Toba supervolcano.

How Pollination Got Going Twice

Pollination by insects actually got going twice.

The Creature That Stumped Darwin

The Toxodon fossils help reveal the mystery surrounding evolution.

How the Starfish Got Its Arms

The Story of How the Starfish Got its Arms Reminds us that Animals have Deep Histories.

Where Are All the Medium-Sized Dinosaurs?

Learn More about the Very Rare Medium-Sized Dinosaurs.

The Island of the Last Surviving Mammoths

The very last mammoths that ever lived experienced what’s known as a mutational meltdown.

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.

Did These Giant Sloths Poop Themselves to Death?

Find out if Sloths Really Did Poop Themselves to Death.

About Eons

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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