TV series
Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age. The evolutionary history of mammals including humans and other modern species is explored with these amazing paleontology experts.
Availability
Checked Jul 22, 2026
Eons premiered June 26, 2017. We don't have a confirmed streaming, rental or purchase option yet.
Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age. The evolutionary history of mammals including humans and other modern species is explored with these amazing paleontology experts.
Choose an episode, then use the watch options above for the show.
Episode 1
Around 10,000 years ago, somewhere in Africa, a microscopic parasite made a huge leap. With a little help from a mosquito, it left its animal host - probably a gorilla - and found its way to a new host: us.
Where to watch EonsEpisode 2
The Snake Detection Hypothesis proposes that the ability to quickly spot and avoid snakes is deeply embedded in primates, including us - an evolutionary consequence of the danger snakes have posed to us over millions of years.
Where to watch EonsEpisode 3
We often think of dinosaurs as either preying on other dinos or mammals, or as plant-eaters -- but in ecosystems today, those aren’t the only two options. So why would we expect dinosaurs to have only been carnivores or herbivores, with the occasional omnivore thrown in the mix?
Where to watch EonsEpisode 4
As revolutionary as teeth were, they would go on to disappear in some groups of vertebrates. But why?
Where to watch EonsEpisode 5
Do our modern horses descend from just one domesticated population, or did it happen many times, in many places? Answering these questions has been tricky, as we’ve needed to bring together evidence from art, archaeology, and ancient DNA…Because, as it turns out, the history of humans and horses has been a pretty wild ride.
Where to watch EonsEpisode 6
Today, all mammals from humans to bats have five fingers or fewer. Yes, even whales, whose finger bones are hidden in their fins. Birds have four or fewer and amphibians get the best of both worlds, often having four digits on their “hands” and five on their “feet.” But no species of vertebrates have more than five digits, let alone eight!
Where to watch EonsEpisode 7
There used to be SO MANY sharks...where did they go?
Where to watch EonsEpisode 8
Dire wolves aren’t actually wolves but what they are might be even cooler.
Where to watch EonsEpisode 9
Could humans survive during the Precambrian?
Where to watch EonsEpisode 10
Don’t be fooled by convergent evolution.
Where to watch EonsEpisode 11
Why do human knees suck?
Where to watch EonsEpisode 12
And it’s been reported that one of the geologists started it on purpose?
Where to watch EonsEpisode 13
The ecological niche of apex predators was empty on Hateg Island, waiting to be occupied by something large, mobile, and powerful enough to fill it.
Where to watch EonsEpisode 15
Would you have survived the K-Pg Impact?
Where to watch EonsEpisode 16
A truly enormous ichthyosaur around the size of a modern sperm whale, reached its size within just a few million years of taking to the water - a blink of an eye in evolutionary time.
Where to watch EonsEpisode 17
Thylacines are definitely extinct!
Where to watch EonsEpisode 18
Hyenas weren’t always able to eat bones. In fact, only a few million years ago, they lived very different lives.
Where to watch EonsEpisode 20
The bird that evolved twice!
Where to watch EonsEpisode 21
Episode 22
Episode 23
I will pass on the parasitic mind-controlling mushroom, thanks
Where to watch EonsEpisode 24
We tend to think that evolution only goes in one direction— toward getting bigger and more advanced. But that’s not always the case. This tiny, simple animal, the Myxozoans, (yes, animal!) evolved from something bigger and more complex.
Where to watch EonsEpisode 25
Episode 26
While sour taste's original purpose was to warn vertebrates of danger, in a few animal groups, including us, its role has reversed. The taste of danger became something it was dangerous for us to avoid.
Where to watch EonsEpisode 27
Only a handful of Denisovan fossils have been identified. In the absence of actual body fossils, it’s impossible for us to reconstruct their morphology, right?
Where to watch EonsEpisode 30
Episode 31
While we’ve been farming for around 10,000 to 12,000 years, the ancestors of ants have been doing it for around 60 million years. So when, and how, and why did ants start … farming?
Where to watch Eons
Episode 32
A mysterious, large feline roamed Eurasia during the last ice age. Its fossils have been found across the continent, and it’s been the subject of ancient artwork. So what exactly were these big cats?
Where to watch EonsEpisode 33
Fossil evidence suggests Diictodon used burrows to breed, and that a parent stayed behind to feed and protect their young. And the parent that stayed behind? It might’ve been the male.
Where to watch EonsEpisode 34
There’s something weird going on at the Cleveland-Lloyd Dinosaur Quarry in what’s now Utah.
Where to watch EonsEpisode 35
Does Homo erectus beat out Homo sapiens?
Where to watch EonsEpisode 36
Sometimes modern problems require ancient, evolutionary solutions.
Where to watch EonsEpisode 37
What was this ancient pup’s last meal?
Where to watch EonsEpisode 38
The newest oldest saber-toothed mammal
Where to watch EonsEpisode 39
In the quest to understand how evolution basically built the woolly mammoth, we may have found the blueprints for building them ourselves.
Where to watch EonsEpisode 40
Paleodictyon, a hexagonal-patterned fossil, is a bit of a mystery. We don’t even know if it’s a trace fossil, or the organism itself. So… what could it be?
Where to watch Eons
Episode 41
In 2003, microbiologists made a huge discovery. One that would force us to reconsider a lot of what we thought we knew about the evolution of microbial life: giant viruses.
Where to watch EonsEpisode 42
Microbiology goes macro with a new giant bacterium!
Where to watch EonsEpisode 43
Spinosaurus had dense bones!
Where to watch EonsEpisode 44
Guemesia: a new no-arm dino
Where to watch Eons
Episode 45
This giant millipede was the largest known invertebrate to ever live on land. So how did it get so big??
Where to watch Eons
Episode 46
Despite the profound changes we’ve made here in recent history, the epic saga of Los Angeles' natural history is still visible - and even striking - if you know where and how to look for it.
Where to watch Eons
Episode 47
Today, billions of people around the world start their day with caffeine. But how and why did the ability to produce this molecule independently evolve in multiple, distantly-related lineages of flowering plants, again and again?
Where to watch EonsEpisode 48
One of the biggest earthquakes humans ever experienced happened around 3800 years ago in what's now northern Chile.
Where to watch EonsEpisode 49
We have no idea where they were all this time, or who stole and returned them and why.
Where to watch EonsEpisode 50
Flesh-eating bees exist!
Where to watch EonsEpisode 51
Archaeologists have discovered an ancient art workshop
Where to watch Eons
Episode 52
There is one - and only one - group of mammals that doesn’t have alpha-gal: the catarrhine primates, which are the monkeys of Africa and Asia, the apes, and us.
Where to watch Eons
Episode 53
Mystacodon is the earliest known mysticete, the group that, today, we call the baleen whales. But if this was a baleen whale, where was its baleen? Where did baleen come from? And how did it live without it?
Where to watch Eons
Episode 54
This fungus was actually manipulating ants’ movements, forcing them to do something they’d never ordinarily do, something strange, yet specific…
Where to watch EonsEpisode 55
Did you know that fossils can get sick? – Specifically with Pyrite Disease
Where to watch EonsEpisode 56
Disaster in the great plains!
Where to watch EonsEpisode 57
80 years ago, a bunch of fossils of ancient humans disappeared.
Where to watch EonsEpisode 58
Congrats! You just found a wombat burrow. And the cubes are its poop.
Where to watch EonsEpisode 59
Wisdom teeth can be such a pain
Where to watch EonsEpisode 60
Paranthropus got chomped by a leopard
Where to watch EonsEpisode 61
We didn’t always wear clothes!
Where to watch EonsEpisode 62
Ancient sperm whale heads belonged on every shark-cuterie board
Where to watch EonsEpisode 63
Mercury, Venus, and Mars are all super low on water – so where did ours come from and why do we have so much of it? We think our water came from a few unlikely sources: meteorites, space dust, and even the sun.
Where to watch EonsEpisode 64
Around the time that some of our fishapod relatives were crawling out of the water, others were turning around and diving right back in.
Where to watch EonsEpisode 65
We might’ve been wrong about how this saber-toothed cat looked
Where to watch EonsEpisode 66
Sometimes evolution is completely predictable.
Where to watch EonsEpisode 67
Shanidar 1 got by with a little help from his friends
Where to watch EonsEpisode 68
Here are two ways to get a fossil species named after you.
Where to watch EonsEpisode information updated Jul 25, 2026
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Hank GreenSelf
PBS Digital StudiosUnited States
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PBS Digital StudiosUnited States