Watched 0 of 39 episodes this season
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Jan 9, 2020
S04E01 - That Time the Mediterranean Sea Disappeared
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Jan 16, 2020
S04E02 - The Neanderthals That Taught Us About Humanity
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Jan 28, 2020
S04E03 - The Giant Dinosaur That Was Missing a Body
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Feb 4, 2020
S04E04 - How South America Made the Marsupials
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Feb 11, 2020
S04E05 - A Short Tale About Diplodocus' Long Neck
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Feb 19, 2020
S04E06 - When the Rainforests Collapsed
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Feb 27, 2020
S04E07 - How a Hot Planet Created the World's Biggest Snake
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Mar 10, 2020
S04E08 - When the Sahara Was Green
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Mar 18, 2020
S04E09 - When Penguins Went From The Sky To The Sea
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Mar 25, 2020
S04E10 - How the Egg Came First
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Mar 31, 2020
S04E11 - How Dogs (Eventually) Became Our Best Friends
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Apr 15, 2020
S04E12 - When a Billion Years Disappeared
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Apr 22, 2020
S04E13 - The Risky Paleo Diets of Our Ancestors
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Apr 29, 2020
S04E14 - How the Andes Mountains Might Have Killed a Bunch of Whales
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May 12, 2020
S04E15 - How Plants Caused the First Mass Extinction
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May 20, 2020
S04E16 - The Two Viruses That We’ve Had For Millions of Years
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May 28, 2020
S04E17 - How We Identified One of Earth’s Earliest Animals
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Jun 9, 2020
S04E18 - When Dinosaur Look-Alikes Ruled the Earth
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Jun 16, 2020
S04E19 - The World Before Plate Tectonics
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Jun 24, 2020
S04E20 - When Dinosaurs Chilled in the Arctic
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Jul 7, 2020
S04E21 - How the Walrus Got Its Tusks
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Jul 16, 2020
S04E22 - The Story of the Dino Stampede
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Jul 23, 2020
S04E23 - The Biggest Frog that Ever Lived
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Aug 5, 2020
S04E24 - The Dinosaur Who Was Buried at Sea
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Aug 13, 2020
S04E25 - How We Figured Out Fermentation
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Aug 20, 2020
S04E26 - The Oddest Couple in the Fossil Record
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Sep 2, 2020
S04E27 - How Ancient Art Captured Australian Megafauna
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Sep 10, 2020
S04E28 - The Sea Monster from the Andes
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Sep 15, 2020
S04E29 - When Rodents Had Horns
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Sep 30, 2020
S04E30 - The First and Last North American Primates
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Oct 7, 2020
S04E31 - How Plants Became Carnivores
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Oct 13, 2020
S04E32 - How Ankylosaurs Got Their Clubs
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Oct 28, 2020
S04E33 - Why Do Things Keep Evolving Into Crabs?
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Nov 10, 2020
S04E34 - How Plankton Created A Bizarre Giant of the Seas
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Nov 19, 2020
S04E35 - The Rise and Fall of the Tallest Mammal to Walk the Earth
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Dec 2, 2020
S04E36 - How Humans Lost Their Fur
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Dec 9, 2020
S04E37 - When Lizards Took Over the World
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Dec 17, 2020
S04E38 - When the Earth Suddenly Stopped Warming
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Dec 22, 2020
S04E39 - The Triassic Reptile With "Two Faces"