Weird Triassic Animal facts you never knew

Added: 2026-05-13

[00:00:00]Weird Triassic period facts you never knew.

[00:00:06]Do you know what it's like to be alive in the aftermath of the Great Dying? No.

[00:00:12]Neither does anyone. 96% of ocean life gone. 70% of land life gone.

[00:00:22]The world is empty and barely breathing.

[00:00:25]Something is rebuilding in the silence.

[00:00:29]You're part of what comes out. Fast. The Triassic.

[00:00:34]The world has one continent, wrong air, and a heat scar down the middle that nothing large can cross.

[00:00:43]Into that world a predator evolution built twice. An animal that was half neck and your direct ancestor. Hint.

[00:00:54]It's not the impressive one.

[00:01:00]Dinosaurs exist in the Triassic. They are small, nervous, and getting eaten.

[00:01:07]The dinosaurs are not fine. The things in charge look like this.

[00:01:15]Postosuchus.

[00:01:16]6 m long. Skull the length of your torso. Walks upright. Serrated teeth.

[00:01:24]130 million years later evolution builds T-Rex. Same skull. Same posture. Same strategy.

[00:01:35]Evolution plagiarized itself and called it the Cretaceous.

[00:01:40]The dinosaurs living alongside Postosuchus are the size of a large dog.

[00:01:46]The animal that gets the theme park spends 30 million years as food. That's it.

[00:01:56]Postosuchus doesn't chase, it waits.

[00:02:00]Then it closes the distance faster than you expect. You hear nothing, then you are dissolved.

[00:02:08]This is one of the earliest dinosaurs ever found, Eoraptor.

[00:02:16]About 1 m long, light, fast.

[00:02:21]If you're expecting something dramatic, lower your expectations immediately.

[00:02:27]This is the beginning of the dinosaur story, not a roar, not dominance. This, a small, slightly nervous animal that looks like it's permanently reconsidering its life choices.

[00:02:42]Now put it next to Postosuchus.

[00:02:44]It stops being impressive. It stops being a predator. It becomes a decision.

[00:02:51]Run, hide, freeze. Pick one quickly and commit.

[00:02:58]This is the entire dinosaur survival strategy for the first 30 million years.

[00:03:04]Don't be visible. Don't be slow.

[00:03:07]Don't be where the problem is.

[00:03:10]Ideally, don't be there at all.

[00:03:13]You don't hunt with this. You don't dominate ecosystems with this. You apologize with this. And it works. Not because it's strong, not because it's clever, because it doesn't die.

[00:03:29]Dinosaurs don't take over the Triassic, they survive it. Quietly, in the background.

[00:03:37]Everything you associate with them, size, power, control, none of it exists yet.

[00:03:46]Right now, they are the background noise with legs.

[00:03:51]And so what was actually running the planet?

[00:03:55]Tanystropheus.

[00:04:00]Tanystropheus was 6 m long. Three of those meters were neck. 12 vertebrae, a giraffe has seven. The neck could only move up and down. Body, also present, technically.

[00:04:17]Two species, one in water, one on land. Different diets, different worlds, same neck.

[00:04:27]It lasted 25 million years with that neck. Our entire human lineage is 6 million. Do the maths.

[00:04:40]Moving on, and it only gets stranger.

[00:04:45]Lystrosaurus.

[00:04:50]Into that silence walked this.

[00:04:53]Pig-sized, barrel-shaped, two blunt tusks. At its peak, 95% of all land vertebrates on Earth. The apocalypse had a favorite. It was this.

[00:05:07]Pick any [clears throat] continent, this is what you'd find.

[00:05:13]Good at everything, brilliant at nothing.

[00:05:17]Eat anything, burrow from heat, tolerate bad air, reproduce fast. Every specialist died with its niche.

[00:05:27]Lystrosaurus didn't have a niche to lose.

[00:05:30]It just stayed. Its descendants survived the Triassic, survived the Jurassic, survived the asteroid, became every mammal on Earth, including you.

[00:05:45]You're descended from this. Not the strongest, not the smartest, the one that didn't need anything.

[00:05:55]One last thing. Then a volcano.

[00:06:00]How it ended.

[00:06:05]A chain of volcanoes split open the Atlantic and erupted for hundreds of thousands of years. CO2 spiked, oceans acidified. 76% of all species died. The Triassic had lasted 51 million years.

[00:06:24]Postosuchus survived the great dying.

[00:06:27]Dominated for 50 million years, then this extinction got it. The small nervous things it had been eating inherited everything. Built the Jurassic on top of it.

[00:06:41]A proto croc evolution liked so much it built twice.

[00:06:49]Dinosaurs that spent millions of years as background noise. A 6-ft reptile that was half there.

[00:06:57]A barrel-shaped ancestor that inherited a broken planet by having no seeds. Then a volcano.

[00:07:05]The dinosaurs ruled the land.

[00:07:08]That barrel-shaped pig animal, 95% of all life on Earth. That's your ancestor.

[00:07:16]The apocalypse is why you exist. Not the impressive version of you, the version that's still here.

[00:07:24]I'm Granite Jane. The Triassic is proof that the universe rewards stubbornness over excellence. Subscribe if that's relevant to your situation.

[00:07:36]See you next time.