Season 4

Video thumbnail: Eons The Ancient Human Species With A Missing Body

Eons

The Ancient Human Species With A Missing Body

Would it really be impossible for us to reconstruct their morphology?

The Ancient Human Species With A Missing Body

Video thumbnail: Eons Why Sour May Be The Oldest Taste

Eons

Why Sour May Be The Oldest Taste

Sour used to be the taste of danger. But, now its role has reversed.

Why Sour May Be The Oldest Taste

Video thumbnail: Eons How the Smallest Animal Got So Simple

Eons

How the Smallest Animal Got So Simple

This tiny, simple animal, the Myxozoans, evolved from something bigger and more complex.

How the Smallest Animal Got So Simple

Video thumbnail: Eons The Extreme Hyenas That Didn't Last

Eons

The Extreme Hyenas That Didn't Last

Only a few million years ago, Hyenas lived very different lives from what we know today.

The Extreme Hyenas That Didn't Last

Video thumbnail: Eons When a Giant Pterosaur Ruled the European Islands

Eons

When a Giant Pterosaur Ruled the European Islands

The giant pterosaur's occupied the empty Hateg Island.

When a Giant Pterosaur Ruled the European Islands

Video thumbnail: Eons Why We Only Have Ten Toes (It's a Long Story)

Eons

Why We Only Have Ten Toes (It's a Long Story)

We learn why all mammals today, from humans to bats, have five fingers or fewer.

Why We Only Have Ten Toes (It's a Long Story)

Video thumbnail: Eons The Sudden Rise of the First Colossal Animal

Eons

The Sudden Rise of the First Colossal Animal

A truly enormous ichthyosaur reached its size within just a few million years.

The Sudden Rise of the First Colossal Animal

Video thumbnail: Eons How Horses Went From Food To Friends

Eons

How Horses Went From Food To Friends

With evidence from from art, archaeology, and ancient DNA, we put together horses history.

How Horses Went From Food To Friends

Video thumbnail: Eons How Vertebrates Got Teeth... And Lost Them Again

Eons

How Vertebrates Got Teeth... And Lost Them Again

Here's why teeth would go on to disappear in some groups of vertebrate.

How Vertebrates Got Teeth... And Lost Them Again

Video thumbnail: Eons How Our Deadliest Parasite Turned To The Dark Side

Eons

How Our Deadliest Parasite Turned To The Dark Side

Around 10,000 years ago, a parasite made a huge leap and found its way to a new host: Us.

How Our Deadliest Parasite Turned To The Dark Side

Video thumbnail: Eons Primates vs Snakes (An Evolutionary Arms Race)

Eons

Primates vs Snakes (An Evolutionary Arms Race)

The Snake Detection Hypothesis is deeply embedded in primates, including us.

Primates vs Snakes (An Evolutionary Arms Race)

Video thumbnail: Eons When Pterosaurs Walked

Eons

When Pterosaurs Walked

Here's how pterosaurs went from being airborne to pedestrian.

When Pterosaurs Walked

Video thumbnail: Eons The Fossil Record In Your Mouth

Eons

The Fossil Record In Your Mouth

Dental calculus is the only part of your body that actually fossilizes while you're alive!

The Fossil Record In Your Mouth

Video thumbnail: Eons Why The Paleo Diet Couldn't Save The Neanderthals

Eons

Why The Paleo Diet Couldn't Save The Neanderthals

Here's why these skilled toolmakers, hunters, and foragers' population disappeared.

Why The Paleo Diet Couldn't Save The Neanderthals

Video thumbnail: Eons When It Was Too Hot for Leaves

Eons

When It Was Too Hot for Leaves

For the first 80 million years of plants' existence, leaves didn't exist. Here's why.

When It Was Too Hot for Leaves

Video thumbnail: Eons How Dinosaurs Coupled Up

Eons

How Dinosaurs Coupled Up

We learn about Dinosaur mating behavior from fossil records.

How Dinosaurs Coupled Up

Video thumbnail: Eons How Ancient Whales May Have Changed the Deep Ocean

Eons

How Ancient Whales May Have Changed the Deep Ocean

Here's how the evolution of ocean-going whales affected deep-ocean communities.

How Ancient Whales May Have Changed the Deep Ocean

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?