Season 4

Video thumbnail: Eons When Mammals Only Went Out At Night

Eons

When Mammals Only Went Out At Night

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

When Mammals Only Went Out At Night

Video thumbnail: Eons How a Mass Extinction Event Created the Amazon

Eons

How a Mass Extinction Event Created the Amazon

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

How a Mass Extinction Event Created the Amazon

Video thumbnail: Eons How a Supervolcano Ignited an Evolutionary Debate

Eons

How a Supervolcano Ignited an Evolutionary Debate

Discover the effects of the Toba supervolcano.

How a Supervolcano Ignited an Evolutionary Debate

Video thumbnail: Eons How Pollination Got Going Twice

Eons

How Pollination Got Going Twice

Pollination by insects actually got going twice.

How Pollination Got Going Twice

Video thumbnail: Eons The Creature That Stumped Darwin

Eons

The Creature That Stumped Darwin

The Toxodon fossils help reveal the mystery surrounding evolution.

The Creature That Stumped Darwin

Video thumbnail: Eons How the Starfish Got Its Arms

Eons

How the Starfish Got Its Arms

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

How the Starfish Got Its Arms

Video thumbnail: Eons Where Are All the Medium-Sized Dinosaurs?

Eons

Where Are All the Medium-Sized Dinosaurs?

Learn More about the Very Rare Medium-Sized Dinosaurs.

Where Are All the Medium-Sized Dinosaurs?

Video thumbnail: Eons The Island of the Last Surviving Mammoths

Eons

The Island of the Last Surviving Mammoths

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

The Island of the Last Surviving Mammoths

Video thumbnail: Eons The Traits That Spawned the Age of Mammals

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.

The Traits That Spawned the Age of Mammals

Video thumbnail: Eons Did These Giant Sloths Poop Themselves to Death?

Eons

Did These Giant Sloths Poop Themselves to Death?

Find out if Sloths Really Did Poop Themselves to Death.

Did These Giant Sloths Poop Themselves to Death?