Season 1

Video thumbnail: Eons The Two People We're All Related To

Eons

The Two People We're All Related To

Two humans managed to pass on a very small fraction of their genomes to all of us.

The Two People We're All Related To

Video thumbnail: Eons Your Place in the Primate Family Tree

Eons

Your Place in the Primate Family Tree

How did we get from a mouse-sized creature that looked more like a squirrel to you?

Your Place in the Primate Family Tree

Video thumbnail: Eons When Giant Amphibians Reigned

Eons

When Giant Amphibians Reigned

A look at when Temnospondyls Amphibians existed for 210 million years

When Giant Amphibians Reigned

Video thumbnail: Eons Can We Get DNA From Fossils?

Eons

Can We Get DNA From Fossils?

Scientists have been working for decades to unlock the genetic secrets of the past.

Can We Get DNA From Fossils?

Video thumbnail: Eons Did Raptorex Really Exist?

Eons

Did Raptorex Really Exist?

Is LH PV18 a Tarbosaurus bataar? Or a different theropod named Raptorex kriegsteini?

Did Raptorex Really Exist?

Video thumbnail: Eons When We First Walked

Eons

When We First Walked

Human ancestors were already walking 3.6 million years ago. But who was first to walk?

When We First Walked

Video thumbnail: Eons Life, Sex & Death Among the Dire Wolves

Eons

Life, Sex & Death Among the Dire Wolves

Dire wolves were real! Their remains taught us a lot about how they lived.

Life, Sex & Death Among the Dire Wolves

Video thumbnail: Eons How a Supervolcano Made the Cenozoic’s Coolest Fossils

Eons

How a Supervolcano Made the Cenozoic’s Coolest Fossils

Yellowstone contains some of North America's most amazing fossil deposits.

How a Supervolcano Made the Cenozoic’s Coolest Fossils

Video thumbnail: Eons How Horses Took Over North America (Twice)

Eons

How Horses Took Over North America (Twice)

Horses vanished from North America for 10,000 years until a mammal brought them back.

How Horses Took Over North America (Twice)

Video thumbnail: Eons When Birds Had Teeth

Eons

When Birds Had Teeth

How did Archaeopteryx relate to today’s birds? Its teeth provide a major clue.

When Birds Had Teeth

Video thumbnail: Eons When Fish Wore Armor

Eons

When Fish Wore Armor

420 million years ago, some fish wore armor – and it may have served a surprising purpose.

When Fish Wore Armor

Video thumbnail: Eons The Mystery of the Eocene’s Lethal Lake

Eons

The Mystery of the Eocene’s Lethal Lake

In the 1800s, miners found beautifully preserved fossils of animals from the Eocene.

The Mystery of the Eocene’s Lethal Lake

Video thumbnail: Eons When Insects First Flew

Eons

When Insects First Flew

Insects were the first animals to fly. Scientists are still working on how it happened.

When Insects First Flew

Video thumbnail: Eons FAQs From Our First Year

Eons

FAQs From Our First Year

To celebrate our first anniversary together, we’d like to answer some of your questions.

FAQs From Our First Year

Video thumbnail: Eons How the T-Rex Lost Its Arms

Eons

How the T-Rex Lost Its Arms

Tyrannosaurus rex had tiny arms. How did this happen, and why did it keep them?

How the T-Rex Lost Its Arms

Video thumbnail: Eons When Fish First Breathed Air

Eons

When Fish First Breathed Air

Before a group of fish could live on dry land, they acquired the ability to breathe air.

When Fish First Breathed Air

Video thumbnail: Eons Where Did Viruses Come From?

Eons

Where Did Viruses Come From?

Where did viruses come from and how did they evolve? Are viruses alive?

Where Did Viruses Come From?

Video thumbnail: Eons Why Triassic Animals Were Just the Weirdest

Eons

Why Triassic Animals Were Just the Weirdest

Why the Triassic was full of creatures that look a lot like other, more modern species.

Why Triassic Animals Were Just the Weirdest

Video thumbnail: Eons That Time It Rained for Two Million Years

Eons

That Time It Rained for Two Million Years

234 million years ago, the climate suddenly changed for the wetter.

That Time It Rained for Two Million Years

Video thumbnail: Eons From the Fall of Dinos to the Rise of Humans

Eons

From the Fall of Dinos to the Rise of Humans

The Cenozoic marks the rise of organisms that look a lot like us.

From the Fall of Dinos to the Rise of Humans

Video thumbnail: Eons The Weird, Watery Tale of Spinosaurus

Eons

The Weird, Watery Tale of Spinosaurus

In 1912, a fossil collector discovered the world’s only known semi-aquatic dinosaur.

The Weird, Watery Tale of Spinosaurus

Video thumbnail: Eons The Age of Reptiles in Three Acts

Eons

The Age of Reptiles in Three Acts

Reptiles in time grew to become some of the largest forms of life ever to exist on earth.

The Age of Reptiles in Three Acts

Video thumbnail: Eons How the Chalicothere Split In Two

Eons

How the Chalicothere Split In Two

How did two of the same kind of animal end up looking so different?

How the Chalicothere Split In Two