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Episode 5: The Calling

The Calling

Season 4 Episode 5
53:05
When Whales Could Walk

When Whales Could Walk

Season 51 Episode 1
53:31
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Overview

Earth's Worst Mass Extinction Is Actually a Warning

Season 2 Episode 12

There is a surprising natural wonder in the middle of the vast West Texas desert: a prehistoric ocean reef built from the remains of ancient sea life. This fossil-rich landscape tells the story of Earth's most devastating mass extinction—and can help enlighten the climate threats we face today.

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The Caribbean town of Plymouth lies frozen in the ash of a devastating volcano.
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Meet the axolotl, Mexico City’s endangered, smiling salamander.
Is This Earth’s Most Treacherous Coastline?
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Florida's once endangered crocodiles are making a very unlikely comeback!
Scientists Solve the Mystery of a 300-Year-Old Megaquake
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Scientists find the exact time of a massive quake using trees, soil and human records.
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Can new scientific research help unravel the mystery of Cahokia's disappearance?
What happened to the once lush, now desert-like Colorado River Delta?
16:32
What happened to the once lush, now desert-like Colorado River Delta?
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9:34
How is this groundbreaking experiment in Ecuador helping deforested rainforests recover?
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Sea otters play a vital role in maintaining the balance of sensitive kelp forests.
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10:14
Exploring LIDAR: Tech using lasers to reveal the deep history beneath our world’s surface.
The Biggest Reason To Feel Hopeful About Climate Change
13:02
Joe visits the world’s largest crane, an engineering feat helping to fight climate change.
Overview Season 1
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These secret islands of the Everglades might be the key to saving it.
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