Episode Overview
Animals seem to repeatedly evolve into crab-like forms independently, raising the question of what makes this shape so evolutionarily advantageous that even non-crab species appear to aspire to it. What is it about the crab's anatomy that drives this fascinating trend in evolution?
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Season 4 Episodes 39
1.
That Time the Mediterranean Sea Disappeared
2.
The Neanderthals That Taught Us About Humanity
3.
The Giant Dinosaur That Was Missing a Body
4.
How South America Made the Marsupials
5.
A Short Tale About Diplodocus' Long Neck
6.
When the Rainforests Collapsed
7.
How a Hot Planet Created the World's Biggest Snake
8.
When the Sahara Was Green
9.
When Penguins Went From The Sky To The Sea
10.
How the Egg Came First
11.
How Dogs (Eventually) Became Our Best Friends
12.
When a Billion Years Disappeared
13.
The Risky Paleo Diets of Our Ancestors
14.
How the Andes Mountains Might Have Killed a Bunch of Whales
15.
How Plants Caused the First Mass Extinction
16.
The Two Viruses That We’ve Had For Millions of Years
17.
How We Identified One of Earth’s Earliest Animals
18.
When Dinosaur Look-Alikes Ruled the Earth
19.
The World Before Plate Tectonics
20.
When Dinosaurs Chilled in the Arctic
21.
How the Walrus Got Its Tusks
22.
The Story of the Dino Stampede
23.
The Biggest Frog that Ever Lived
24.
The Dinosaur Who Was Buried at Sea
25.
How We Figured Out Fermentation
26.
The Oddest Couple in the Fossil Record
27.
How Ancient Art Captured Australian Megafauna
28.
The Sea Monster from the Andes
29.
When Rodents Had Horns
30.
The First and Last North American Primates
31.
How Plants Became Carnivores
32.
How Ankylosaurs Got Their Clubs
33.
Why Do Things Keep Evolving Into Crabs?
34.
How Plankton Created A Bizarre Giant of the Seas
35.
The Rise and Fall of the Tallest Mammal to Walk the Earth
36.
How Humans Lost Their Fur
37.
When Lizards Took Over the World
38.
When the Earth Suddenly Stopped Warming
39.
The Triassic Reptile With "Two Faces"
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