Season 4

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?