Eons

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  • Documentary

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2018
2018x1
How Two Microbes Changed History
Episode overview
What if I told you that, more than two billion years ago, some tiny living thing started to live inside another living thing … and never left? And now, the descendants of both of those things are in you?
2018x2
The Time Terror Birds Invaded
Episode overview
About 5 million years ago, a new predator made its way from the south and onto the coastal plains of North America. It was a giant, flightless, carnivorous bird and came to be known by .. show full overview
2018x3
Untangling the Devil's Corkscrew
Episode overview
In the late 1800s, paleontologists in Nebraska found huge coils of hardened sand stuck deep in the earth. Local ranchers called them Devil's Corkscrews and scientists called them .. show full overview
2018x4
The Great Snake Debate
Episode overview
90 million years ago, an ancient snake known as Najash had...legs. It is by no means the only snake to have limbs either. But what’s even stranger: we’re not at all sure where it came from.
2018x5
The Whole Saga of the Supercontinents
Episode overview
The study of natural history is the study of how the world has changed but Earth itself is in a constant state of flux -- because the ground beneath your feet is always moving. So if we .. show full overview
2018x6
From the Cambrian Explosion to the Great Dying
Episode overview
The first era of our current eon, the Paleozoic Era, is probably the most deceptively fascinating time in Earth’s history. With near constant revolutions in life, punctuated by catastrophic extinctions, it is also one of the most chaotic.
2018x7
How Sex Became a Thing
Episode overview
We don’t know which living thing was the very first to arrive at the totally revolutionary process that is sexual reproduction but we can follow the history of how (and why) sex became a thing.
2018x8
The Other Explosion You Should Know About
Episode overview
Fossils found around the world suggest that multi-cellular life was not only present before the Cambrian Explosion, it was much more elaborate and diverse than anyone thought. This is .. show full overview
2018x9
How the Turtle Got Its Shell
Episode overview
Where did turtles come from? And how did the they get their shells? The answers to these questions would eventually cause scientists to rethink the entire history of reptile evolution.
2018x10
What a Dinosaur Looks Like Under a Microscope
Episode overview
We traveled to Bozeman, Montana to meet with Dr. Ellen-Thérèse Lamm who explores ancient life by studying it at the cellular level. Kallie and Dr. Lamm discuss how she does this, and what she’s learned by putting dinosaur bones under a microscope.
2018x11
The Most Useful Fossils in the World
Episode overview
For decades, one of the most abundant kinds of fossils on Earth, numbering in the millions of specimens, was a mystery to paleontologists. But geologists discovered that these mysterious fossils could basically be used to tell time in the deep past.
2018x12
Inside the Dinosaur Library
Episode overview
We're back in Bozeman, Montana this week talking to Amy Atwater, Collections Manager at the Museum of the Rockies. MOR has among the largest collections of North American dinosaurs in .. show full overview
2018x13
What Was the Ancestor of Everything?
Episode overview
The search for our origins go back to a single common ancestor -- one that remains shrouded in mystery. It’s the ancestor of everything we know and today scientists call it the last universal common ancestor, or LUCA.
2018x14
How the Squid Lost Its Shell
Episode overview
The ancestors of modern, squishy cephalopods like the octopus and the squid all had shells. In ancient times, their shell was their greatest asset but it eventually proved to be their biggest weakness.
2018x15
How the Chalicothere Split In Two
Episode overview
Two extinct relatives of horses and rhinos are closely related to each other but have strikingly different body plans. How did two of the same kind of animal, living in the same place, end up looking so different?
2018x16
The Age of Reptiles in Three Acts
Episode overview
Reptiles emerged from the Paleozoic as humble creatures, but in time, they grew to become some of the largest forms of life ever to stomp, swim, and soar across the planet. This Age of .. show full overview
2018x17
The Weird, Watery Tale of Spinosaurus
Episode overview
In 1912, a fossil collector discovered some strange bone fragments in the eerie, beautiful Cretaceous Bahariya rock formation of Egypt. Eventually, that handful of fossil fragments would .. show full overview
2018x18
From the Fall of Dinos to the Rise of Humans
Episode overview
After taking you on a journey through geologic time, we've arrived at the Cenozoic Era. Most of the mammals and birds that you can think of appeared during this era but perhaps more .. show full overview
2018x19
That Time It Rained for Two Million Years
Episode overview
At the beginning of the Triassic Period, with the continents locked together from pole-to-pole in the supercontinent of Pangea, the world is hot, flat, and very, very dry. But then 234 million years ago, the climate suddenly changed for the wetter.
2018x20
Why Triassic Animals Were Just the Weirdest
Episode overview
The Triassic was full of creatures that look a lot like other, more modern species, even though they’re not closely related at all. The reason for this has to do with how evolution works .. show full overview
2018x21
Where Did Viruses Come From?
Episode overview
There are fossils of viruses, of sorts, preserved in the DNA of the hosts that they’ve infected. Including you. This molecular fossil trail can help us understand where viruses came .. show full overview
2018x22
When Fish First Breathed Air
Episode overview
385 million years ago, a group of fish would undertake one of the most important journeys in the history of life and become the first vertebrates to live on dry ground. But first, they had to acquire the ability to breathe air.
2018x23
How the T-Rex Lost Its Arms
Episode overview
Tyrannosaurus rex was big, Tyrannosaurus rex was vicious, and Tyrannosaurus rex had tiny arms. The story of how T-Rex lost its arms is, itself, pretty simple. But the story of why it .. show full overview
2018x24
FAQs From Our First Year
Episode overview
Over the first season of PBS Eons, we’ve explored the history of Earth from the very origins of life right up to the Cenozoic Era that we’re in now. To celebrate our first anniversary .. show full overview
2018x25
When Insects First Flew
Episode overview
Insects were the first animals to ever develop the ability to fly, and, arguably, they did it the best. But this development was so unusual that scientists are still/working on, and arguing about, how and when insect wings first came about.
2018x26
The Mystery of the Eocene’s Lethal Lake
Episode overview
In 1800s, miners began working in exposed deposits of mud near the town of Messel, Germany. They were extracting oil from the rock and along with the oil, they found beautifully .. show full overview
2018x27
When Fish Wore Armor
Episode overview
420 million years ago, some fish were more medieval. They wore armor, sometimes made of big plates, and sometimes made of interlocking scales. But that armor may actually have served a totally different purpose, one that many animals still use today.
2018x28
When Birds Had Teeth
Episode overview
Experts are still arguing over whether Archaeopteryx was a true bird, or a paravian dinosaur, or some other kind of dino. But regardless of what side you’re on, how did this fascinating, .. show full overview
2018x29
How Horses Took Over North America (Twice)
Episode overview
The ancestors of modern horses became so successful that they spread all over the world, to Europe, Asia, South America, and Africa. But in their native range of North America, they’ll .. show full overview
2018x30
How a Supervolcano Made the Cenozoic’s Coolest Fossils
Episode overview
One of the most dynamic, transformative, and potentially dangerous features in North America is also responsible for some of the continent’s most amazing fossil deposits. It’s a supervolcano we now call Yellowstone.
2018x31
The Rise and Fall of the Bone-Crushing Dogs
Episode overview
A huge and diverse subfamily of dogs, the bone-crushers patrolled North America for more than thirty million years, before they disappeared in the not-too-distant past. So what happened to the biggest dogs that ever lived?
2018x32
Life, Sex & Death Among the Dire Wolves
Episode overview
This is not a Game of Thrones fan fiction episode. Dire wolves were real! And thousands of them died in the same spot in California. Their remains have taught us volumes about how they .. show full overview
2018x33
When We First Walked
Episode overview
Fossilized footprints have proved that human ancestors were already striding across the landscape 3.6 million years ago. But who started them on that path? What species pioneered this style of locomotion? Who was the first to walk?
2018x34
Did Raptorex Really Exist?
Episode overview
Paleontologists have been studying and drawing totally different conclusions about the fossil LH PV18 for almost a decade. Is it just one of many specimens of a theropod called .. show full overview
2018x35
Can We Get DNA From Fossils?
Episode overview
In 1993, scientists cracked open a piece of amber, took out the body of an ancient weevil, and sampled its DNA. Or, at least, so we thought. It took another few decades of research, and .. show full overview
2018x36
When Giant Amphibians Reigned
Episode overview
Temnospondyls were a huge group of amphibians that existed for 210 million years. And calling them ‘diverse’ would be putting it mildly. Yet in the end, two major threats would push them to extinction: the always-changing climate and the amniote egg.
2018x37
Your Place in the Primate Family Tree
Episode overview
Purgatorius, a kind of mammal called a plesiadapiform, might’ve been one of your earliest ancestors. But how did we get from a mouse-sized creature that looked more like a squirrel than a monkey -- to you, a member of Homo sapiens?
2018x38
The Two People We're All Related To
Episode overview
Due to an odd quirk of genetics and some unique evolutionary circumstances, two humans who lived at different times in the distant past managed to pass on a very small fraction of their genomes to you. And to me. To all of us.
2018x39
When Rodents Rafted Across the Ocean
Episode overview
The best evidence we have suggests that, while Caviomorpha originated in South America, they came from ancestors in Africa, over 40 million years ago. So how did they get there?
2018x40
When Birds Stopped Flying
Episode overview
Ratites have spread to Africa, Australia, New Zealand, and South America. And there are fossils of Ratites in Europe, Asia, and North America too. That’s a lot of ground to cover for birds that can’t fly. So how did Ratites end up all over the world?
2018x41
When Camels Roamed North America
Episode overview
Camels are famous for adaptations that have allowed them to flourish where most other large mammals would perish. But their story begins over 40 million years ago in North America, and in an environment you’d never expect: a rainforest.
2018x42
How Sloths Went From the Seas to the Trees
Episode overview
The story of sloths is one of astounding ecological variability, with some foraging in the seas, others living underground, and others still hiding from predators in towering cliffs. So why are their only living relatives in the trees?
2018x43
When Sharks Swam the Great Plains
Episode overview
If you’ve ever been to, or lived in, or even flown over the central swath of North America, then you’ve seen the remnants of what was a uniquely fascinating environment. Scientists call .. show full overview
2018x44
When Apes Conquered Europe
Episode overview
Today, our closest evolutionary relatives, the apes, live only in small pockets of Africa and Asia. But back in the Miocene epoch, apes occupied all of Europe. Why aren’t there wild apes in Europe today?
2018x45
Why Megalodon (Definitely) Went Extinct
Episode overview
For more than 10 million years, Megalodon was at the top of its game as the oceans’ apex predator...until 2.6 million years ago, when it went extinct. So, what happened to the largest shark in history?

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