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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
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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
Where Did Viruses Come From?
Where did viruses come from and how did they evolve? Are viruses alive?
S1 Ep45 | 7m 29s
Why Triassic Animals Were Just the Weirdest
Why the Triassic was full of creatures that look a lot like other, more modern species.
S1 Ep44 | 9m 7s
That Time It Rained for Two Million Years
234 million years ago, the climate suddenly changed for the wetter.
S1 Ep43 | 7m 31s
From the Fall of Dinos to the Rise of Humans
The Cenozoic marks the rise of organisms that look a lot like us.
S1 Ep42 | 12m 34s
The Weird, Watery Tale of Spinosaurus
In 1912, a fossil collector discovered the world’s only known semi-aquatic dinosaur.
S1 Ep41 | 7m 28s
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.
S1 Ep40 | 10m 45s
How the Chalicothere Split In Two
How did two of the same kind of animal end up looking so different?
S1 Ep39 | 7m 3s
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