Eons
(06/26/2017–07/01/2025)Source: unknown
Episodes
S2017E01
The Trouble With Trilobites
S2017E02
When Did the First Flower Bloom?
S2017E03
The Tully Monster & Other Problematic Creatures
S2017E04
Stegosaurs: Tiny Brains & Thagomizers
S2017E05
What Colors Were Dinosaurs?
S2017E06
The Story of Saberteeth
S2017E07
That Time Oxygen Almost Killed Everything
S2017E08
The Biggest Thing That Ever Flew
S2017E09
Dimetrodon: Our Most Unlikely Ancestor
S2017E10
The Extinction That Never Happened
S2017E11
The Strange Case of the Buzzsaw Jaws
S2017E12
The Age of Giant Insects
S2017E13
History's Most Powerful Plants
S2017E14
How Did Dinosaurs Get So Huge?
S2017E15
When The Earth Was Purple
S2017E16
'Living Fossils' Aren't Really a Thing
S2017E17
When Whales Walked
S2017E18
An Illustrated History of Dinosaurs
S2017E19
A Brief History of Geologic Time
S2017E20
The Search for the Earliest Life
S2017E21
The Facts About Dinosaurs & Feathers
S2017E22
The Last Time the Globe Warmed
S2017E23
What Happened to the World's Greatest Ape?
S2017E24
When Giant Fungi Ruled
S2018E01
How Two Microbes Changed History
S2018E02
The Time Terror Birds Invaded
S2018E03
Untangling the Devil's Corkscrew
S2018E04
The Great Snake Debate
S2018E05
The Whole Saga of the Supercontinents
S2018E06
From the Cambrian Explosion to the Great Dying
S2018E07
How Sex Became a Thing
S2018E08
The Other Explosion You Should Know About
S2018E09
How the Turtle Got Its Shell
S2018E10
What a Dinosaur Looks Like Under a Microscope
S2018E11
The Most Useful Fossils in the World
S2018E12
Inside the Dinosaur Library
S2018E13
What Was the Ancestor of Everything?
S2018E14
How the Squid Lost Its Shell
S2018E15
How the Chalicothere Split In Two
S2018E16
The Age of Reptiles in Three Acts
S2018E17
The Weird, Watery Tale of Spinosaurus
S2018E18
From the Fall of Dinos to the Rise of Humans
S2018E19
That Time It Rained for Two Million Years
S2018E20
Why Triassic Animals Were Just the Weirdest
S2018E21
Where Did Viruses Come From?
S2018E22
When Fish First Breathed Air
S2018E23
How the T-Rex Lost Its Arms
S2018E24
FAQs From Our First Year
S2018E25
When Insects First Flew
S2018E26
The Mystery of the Eocene's Lethal Lake
S2018E27
When Fish Wore Armor
S2018E28
When Birds Had Teeth
S2018E29
How Horses Took Over North America (Twice)
S2018E30
How a Supervolcano Made the Cenozoic's Coolest Fossils
S2018E31
The Rise and Fall of the Bone-Crushing Dogs
S2018E32
Life, Sex & Death Among the Dire Wolves
S2018E33
When We First Walked
S2018E34
Did Raptorex Really Exist?
S2018E35
Can We Get DNA From Fossils?
S2018E36
When Giant Amphibians Reigned
S2018E37
Your Place in the Primate Family Tree
S2018E38
The Two People We're All Related To
S2018E39
When Rodents Rafted Across the Ocean
S2018E40
When Birds Stopped Flying
S2018E41
When Camels Roamed North America
S2018E42
How Sloths Went From the Seas to the Trees
S2018E43
When Sharks Swam the Great Plains
S2018E44
When Apes Conquered Europe
S2018E45
Why Megalodon (Definitely) Went Extinct
S2019E01
When Humans Were Prey
S2019E02
How Blood Evolved (Many Times)
S2019E03
The Humans That Lived Before Us
S2019E04
The Island of Shrinking Mammoths
S2019E05
The Evolution of the Heart (A Love Story)
S2019E06
How 7,000 Years of Epic Floods Changed the World
S2019E07
The Island of Huge Hamsters and Giant Owls
S2019E08
The Giant Bird That Got Lost in Time
S2019E09
When We First Made Tools
S2019E10
When Giant Scorpions Swarmed the Seas
S2019E11
When We Tamed Fire
S2019E12
The Mystery Behind the Biggest Bears of All Time
S2019E13
The Croc That Ran on Hooves
S2019E14
When We Took Over the World
S2019E15
The Ghostly Origins of the Big Cats
S2019E16
The History of Climate Cycles (and the Woolly Rhino) Explained
S2019E17
The Hellacious Lives of the "Hell Pigs"
S2019E18
How Evolution Works (And How We Figured It Out)
S2019E19
When the Synapsids Struck Back
S2019E20
When Ichthyosaurs Led a Revolution in the Seas
S2019E21
When We Met Other Human Species
S2019E22
How Volcanoes Froze the Earth (Twice)
S2019E23
How Earth's First, Unkillable Animals Saved the World
S2019E24
When Giant Deer Roamed Eurasia
S2019E25
Was This Dinosaur a Cannibal?
S2019E26
The Missing Link That Wasn't
S2019E27
The Raptor That Made Us Rethink Dinosaurs
S2019E28
When Bats Took Flight
S2019E29
How Pterosaurs Got Their Wings
S2019E30
When Giant Lemurs Ruled Madagascar
S2019E31
When Antarctica Was Green
S2019E32
The (Ovi)Raptor That Paleontologists Got Wrong
S2019E33
When Hobbits Were Real
S2019E34
Were These Monsters Inspired by Fossils?
S2019E35
How We Domesticated Cats (Twice)
S2019E36
When Giant Hypercarnivores Prowled Africa
S2019E37
Why Male Mammoths Lost the Game
S2019E38
The Forgotten Story of the Beardogs
S2019E39
The Fuzzy Origins of the Giant Panda
S2020E01
That Time the Mediterranean Sea Disappeared
S2020E02
The Neanderthals That Taught Us About Humanity
S2020E03
The Giant Dinosaur That Was Missing a Body
S2020E04
How South America Made the Marsupials
S2020E05
A Short Tale About Diplodocus' Long Neck
S2020E06
When the Rainforests Collapsed
S2020E07
How a Hot Planet Created the World's Biggest Snake
S2020E08
When the Sahara Was Green
S2020E09
When Penguins Went From The Sky To The Sea
S2020E10
How the Egg Came First
S2020E11
How Dogs (Eventually) Became Our Best Friends
S2020E12
When a Billion Years Disappeared
S2020E13
The Risky Paleo Diets of Our Ancestors
S2020E14
How the Andes Mountains Might Have Killed a Bunch of Whales
S2020E15
How Plants Caused the First Mass Extinction
S2020E16
The Two Viruses That We've Had For Millions of Years
S2020E17
How We Identified One of Earth's Earliest Animals
S2020E18
When Dinosaur Look-Alikes Ruled the Earth
S2020E19
The World Before Plate Tectonics
S2020E20
When Dinosaurs Chilled in the Arctic
S2020E21
How the Walrus Got Its Tusks
S2020E22
The Story of the Dino Stampede
S2020E23
The Biggest Frog that Ever Lived
S2020E24
The Dinosaur Who Was Buried at Sea
S2020E25
How We Figured Out Fermentation
S2020E26
The Oddest Couple in the Fossil Record
S2020E27
How Ancient Art Captured Australian Megafauna
S2020E28
The Sea Monster from the Andes
S2020E29
When Rodents Had Horns
S2020E30
The First and Last North American Primates
S2020E31
How Plants Became Carnivores
S2020E32
How Ankylosaurs Got Their Clubs
S2020E33
Why Do Things Keep Evolving Into Crabs?
S2020E34
How Plankton Created A Bizarre Giant of the Seas
S2020E35
The Rise and Fall of the Tallest Mammal to Walk the Earth
S2020E36
How Humans Lost Their Fur
S2020E37
When Lizards Took Over the World
S2020E38
When the Earth Suddenly Stopped Warming
S2020E39
The Triassic Reptile With "Two Faces"
S2021E01
What Happened to the World's Biggest Beaver?
S2021E02
The Reign of the Hell Ants
S2021E03
The Pandemic That Lasted 15 Million Years
S2021E04
When We First Talked
S2021E05
The Return of Giant Skin-Shell Sea Turtles
S2021E06
The Genes We Lost Along the Way
S2021E07
Our Bizarre, Possibly Venomous, Relative
S2021E08
How Worm Holes Ended Wormworld
S2021E09
How Humans Became (Mostly) Right-Handed
S2021E10
How Chilis Got Spicy (and Why We Love the Burn)
S2021E11
How To Survive the Little Ice Age
S2021E12
When Crocs Thrived in the Seas
S2021E13
When Trees Took Over the World
S2021E14
How Weasels Got Skinny
S2021E15
Where Are All The Squid Fossils?
S2021E16
Did These Giant Sloths Poop Themselves to Death?
S2021E17
The Traits That Spawned the Age of Mammals
S2021E18
The Island of the Last Surviving Mammoths
S2021E19
Where Are All the Medium-Sized Dinosaurs?
S2021E20
How the Starfish Got Its Arms
S2021E21
The Creature That Stumped Darwin
S2021E22
How Pollination Got Going Twice
S2021E23
How a Supervolcano Ignited an Evolutionary Debate
S2021E24
How a Mass Extinction Event Created the Amazon
S2021E25
When Mammals Only Went Out At Night
S2021E26
How Ancient Whales May Have Changed the Deep Ocean
S2021E27
How Dinosaurs Coupled Up
S2021E28
When It Was Too Hot for Leaves
S2021E29
Why The Paleo Diet Couldn't Save The Neanderthals
S2021E30
The Fossil Record In Your Mouth
S2021E31
When Pterosaurs Walked
S2022E01
How Our Deadliest Parasite Turned to the Dark Side
S2022E02
Primates vs Snakes (An Evolutionary Arms Race)
S2022E03
How the Rise of Social Insects Shrunk These Dinosaurs
S2022E04
How Vertebrates Got Teeth... And Lost Them Again
S2022E05
How Horses Went From Food To Friends
S2022E06
Why We Only Have Ten Toes (It's a Long Story)
S2022E07
When a Giant Pterosaur Ruled the European Islands
S2022E08
The Sudden Rise of the First Colossal Animal
S2022E09
The Extreme Hyenas That Didn't Last
S2022E10
How the Smallest Animal Got So Simple
S2022E11
Why Sour May Be The Oldest Taste
S2022E12
The Ancient Human Species With A Missing Body
S2022E13
When Ants Domesticated Fungi
S2022E14
The Curious Case of the Cave Lion
S2022E15
Is This The Oldest Dad In The Fossil Record?
S2022E16
How To Build A Woolly Mammoth (But Should We?)
S2022E17
Something Has Been Making This Mark For 500 Million Years
S2022E18
Giant Viruses Blur The Line Between Alive and Not
S2022E19
When Giant Millipedes Reigned
S2022E20
How Plate Tectonics Transformed Los Angeles
S2022E21
Why Does Caffeine Exist?
S2022E22
Did An Ancient Pathogen Reshape Our Cells?
S2022E23
How Whale Evolution Kind Of Sucked
S2022E24
The Fungi That Turned Ants Into Zombies
S2022E25
Where Did Water Come From?
S2022E26
Our Ancient Relative That Said 'No Thanks' To Life On Land
S2022E27
Darwin Missed An Example of Evolution Right Under His Nose
S2022E28
Are We All Actually Archaea?
S2022E29
How Plate Tectonics Gave Us Seahorses
S2022E30
We Met Neandertals Way Earlier Than We Thought
S2022E31
Thylacoleo Is The Missing Australian Apex Predator
S2022E32
How Did Lucy Live and Die?
S2023E01
These Creatures Were Darwin's Greatest Enemy
S2023E02
When Ancient People Changed Their Own DNA
S2023E03
The Neandertal Burial That Taught Us About Humanity
S2023E04
These Fossils Were Supposed To Be Impossible
S2023E05
The Mystery Of The Mashed-Up Dinosaurs
S2023E06
How a Mass Extinction Changed Our Brains
S2023E07
That Time the American West Blew Up
S2023E08
Does Our "Junk" DNA Make Us Human?
S2023E09
Nautiloids Thrived For 500 Million Years Until These Guys Appeared
S2023E10
The Real Story Of The Dodo Bird's (Current) Extinction
S2023E11
How (Some) Plants Survived The K-Pg Extinction
S2023E12
It's Becoming Very Clear That Birds Are Not Normal
S2023E13
The Invisible Barrier Keeping Two Worlds Apart
S2023E14
A Natural History of Mars
S2023E15
We've Had The Giraffe's Neck All Wrong
S2023E16
We Helped Make Mosquitoes A Problem
S2023E17
Did a Tsunami Swallow Part of Europe?
S2023E18
That Time The Ocean Lost (Almost) All Its Oxygen
S2023E19
This Is An Ant World, We're Just Living In It
S2023E20
Are Giant Animals Inevitable?
S2023E21
When Did We Stop Being Naked?
S2023E22
The Secret Extinctions Of The Silurian Period
S2023E23
Beans & Bees (Not Bats) Gave Us Butterflies
S2023E24
Why Only Earth Has Fire
S2024E01
How Ancient Microbes Rode Bug Bits Out to Sea
S2024E02
Our Most Mysterious Extinct Cousins
S2024E03
Animals Might Be Much Older Than We Thought
S2024E04
Why Is It So Hard to Tell the Sex of a Dinosaur?
S2024E05
How Snake Venom Sparked An Evolutionary Arms Race
S2024E06
When Did We Start Practicing Medicine?
S2024E07
What Will Earth Be Like 300 Million Years From Now?
S2024E08
The Hazy Evolution of Cannabis
S2024E09
There's No Single Cradle of Humankind
S2024E10
How Sponges Beat The First Mass Extinction
S2024E11
When The Atlantic Ripped Open A Supercontinent
S2024E12
When India Was An Island
S2024E13
The Mystery of South America's False Horses
S2024E14
What Was The First Beverage?
S2024E15
How The Elephant Got Its Trunk
S2024E16
When Earth "Ate" A Planet
S2024E17
How the Himalayas Changed the World
S2024E18
The Dinosaurs That Evolution Forgot
S2024E19
What Happened To The Other Mesozoic Mammals?
S2024E20
How Animals Got Butts
S2024E21
When the Amazon Flowed Backwards
S2024E22
When Neandertals Became Apex Predators
S2025E01
Did Asteroids Spark Life?
S2025E02
The Mystery of the Cretaceous Pompeii
S2025E03
The Strange Primates That Thrived In The Mountains
S2025E04
Why Wasn't There A Second Age of Reptiles?
S2025E05
The Graveyard at the Center of the Earth
S2025E06
The Arms Race That Made Insects Take Flight
S2025E07
When Red Pandas Roamed North America
S2025E08
The Rise and Fall of a Whale-Eating Sea Monster
S2025E09
There's An Invisible Ocean Between These Fossils
S2025E10
Darwin's Final Obsession
S2025E11
The Dinosaurs Too Big To Be Dinosaurs
S2025E12
Why Paleontologists Can't Stop Fighting About Spinosaurus