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Why Megalodon (Definitely) Went Extinct
What happened to the largest shark in history?
S1 Ep69 | 10m 45s
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When Apes Conquered Europe
Today, apes live only in Africa and Asia but this wasn't always the case.
S1 Ep68 | 8m 8s
When Sharks Swam the Great Plains
When Sharks Swam the Great Plains
S1 Ep67 | 11m 45s
How Sloths Went From the Seas to the Trees
The story of sloths is one of astounding ecological variability.
S1 Ep66 | 11m 45s
When Camels Roamed North America
Camels' origins story begins in an environment you’d never expect: a rainforest.
S1 Ep65 | 9m 45s
When Birds Stopped Flying
For birds that can't fly, how did Ratites end up all over the world?
S1 Ep64 | 7m 15s
When Rodents Rafted Across the Ocean
How did Caviomorpha migrate from South American to Africa?
S1 Ep63 | 9m 59s
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.
S1 Ep62 | 8m 44s
Your Place in the Primate Family Tree
How did we get from a mouse-sized creature that looked more like a squirrel to you?
S1 Ep61 | 11m 35s
When Giant Amphibians Reigned
A look at when Temnospondyls Amphibians existed for 210 million years
S1 Ep60 | 9m 51s
Can We Get DNA From Fossils?
Scientists have been working for decades to unlock the genetic secrets of the past.
S1 Ep59 | 11m 22s
Did Raptorex Really Exist?
Is LH PV18 a Tarbosaurus bataar? Or a different theropod named Raptorex kriegsteini?
S1 Ep58 | 12m 27s
When We First Walked
Human ancestors were already walking 3.6 million years ago. But who was first to walk?
S1 Ep57 | 10m 56s
Life, Sex & Death Among the Dire Wolves
Dire wolves were real! Their remains taught us a lot about how they lived.
S1 Ep56 | 9m 15s
The Rise and Fall of the Bone-Crushing Dogs
What happened to the biggest dogs that ever lived?
S1 Ep55 | 8m 29s
How a Supervolcano Made the Cenozoic’s Coolest Fossils
Yellowstone contains some of North America's most amazing fossil deposits.
S1 Ep54 | 9m 15s
How Horses Took Over North America (Twice)
Horses vanished from North America for 10,000 years until a mammal brought them back.
S1 Ep53 | 9m 8s
When Birds Had Teeth
How did Archaeopteryx relate to today’s birds? Its teeth provide a major clue.
S1 Ep52 | 11m 29s
When Fish Wore Armor
420 million years ago, some fish wore armor – and it may have served a surprising purpose.
S1 Ep51 | 9m 37s
The Mystery of the Eocene’s Lethal Lake
In the 1800s, miners found beautifully preserved fossils of animals from the Eocene.
S1 Ep50 | 7m 59s
When Insects First Flew
Insects were the first animals to fly. Scientists are still working on how it happened.
S1 Ep49 | 8m 38s
FAQs From Our First Year
To celebrate our first anniversary together, we’d like to answer some of your questions.
S1 Ep48 | 9m 20s
How the T-Rex Lost Its Arms
Tyrannosaurus rex had tiny arms. How did this happen, and why did it keep them?
S1 Ep47 | 6m 54s
When Fish First Breathed Air
Before a group of fish could live on dry land, they acquired the ability to breathe air.
S1 Ep46 | 8m 40s