Season 4

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?