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The Age of Reptiles in Three Acts

The Age of Reptiles in Three Acts

Season 1 Episode 40
10:45
The Weird, Watery Tale of Spinosaurus

The Weird, Watery Tale of Spinosaurus

Season 1 Episode 41
7:28
Early Life on Earth

Where Did Viruses Come From?

Season 1 Episode 45
7:29
When Fish First Breathed Air

When Fish First Breathed Air

Season 1 Episode 46
8:40
Dinosaurs

How the T-Rex Lost Its Arms

Season 1 Episode 47
6:54
FAQs From Our First Year

FAQs From Our First Year

Season 1 Episode 48
9:20
When Insects First Flew

When Insects First Flew

Season 1 Episode 49
8:38
When Fish Wore Armor

When Fish Wore Armor

Season 1 Episode 51
9:37
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Eons

How the Chalicothere Split In Two

Season 1 Episode 39

Two extinct relatives of horses and rhinos are closely related to each other but have strikingly different body plans. How did two of the same kind of animal, living in the same place, end up looking so different?

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Life, Sex & Death Among the Dire Wolves
9:15
Dire wolves were real! Their remains taught us a lot about how they lived.
The Rise and Fall of the Bone-Crushing Dogs
8:29
What happened to the biggest dogs that ever lived?
Earth & Climate Science
9:15
Yellowstone contains some of North America's most amazing fossil deposits.
How Horses Took Over North America (Twice)
9:08
Horses vanished from North America for 10,000 years until a mammal brought them back.
When Birds Had Teeth
11:29
How did Archaeopteryx relate to today’s birds? Its teeth provide a major clue.
When Fish Wore Armor
9:37
420 million years ago, some fish wore armor – and it may have served a surprising purpose.
The Mystery of the Eocene’s Lethal Lake
7:59
In the 1800s, miners found beautifully preserved fossils of animals from the Eocene.
When Insects First Flew
8:38
Insects were the first animals to fly. Scientists are still working on how it happened.
FAQs From Our First Year
9:20
To celebrate our first anniversary together, we’d like to answer some of your questions.
Dinosaurs
6:54
Tyrannosaurus rex had tiny arms. How did this happen, and why did it keep them?
When Fish First Breathed Air
8:40
Before a group of fish could live on dry land, they acquired the ability to breathe air.
Early Life on Earth
7:29
Where did viruses come from and how did they evolve? Are viruses alive?
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