The Extinction That Caused The Dinosaurs (And If It Never Happened)

There was once an extinction that wiped out so much life on Earth, it was practically a reset button. So what if that button was never, pushed? Life goes down a far different path.

Special thanks to my paleontologist friend Matt for helping out, as well as shoutout to TreytheExplainer for inspiring this video.

[AlternateHistoryHub]

Sorry for once again a month without a video. I never did speculative evolution before so this was a new field for me.

[mymom]

Bruh you just got into Speculative Evolution. This is awesome.

[Chris-jwvm]

Glad you covered this. I find it sad that this is one of the most unknown time periods. I've told people that mammals that still retained some lizard traits dominated before dinosaurs and they more or less ask me if I read that on Facebook.

[davidschaftenaar]

7:25 This animal isn't extinct in the least: It's alive and well in my *nightmares*

[selimacast]

“The dinosaurs wouldn’t have went extinct if they had a space program”

[ease-l]

The extinction no one ever talks about. Love it

[grimtheghastly]

I think this my favorite video so far. From about the age of three, I had an unhealthy obsession with dinosaurs and prehistoric creatures. It kinda faded into the background as I got older but it was still there. This video helped me rediscover my love for these fantastic beasts for lack of a better term. Thank you.

[PsychShrew]

Cody: Evolution, Synapsids, Mammals
Me: "ooo lizard puppies!"

[noahmartin]

Nobody:
Cody: This is entirely speculation

[SupersuMC]

0:39 - 0:49 "Events out of individuals' control that changed the game and set the stage for new players to come in and effectively dominate the Earth."

I see TierZoo has taught you well, Cody. ;D

[bruh]

As a paleo enthusiast who also loves human history it’s great to see you talk about both. Keep it up! I’d recommend if you were to do another thing like this I’d learn about war between the Arthropods vs vertebrates. Maybe do what if the Arthropods won the evolution war? I’d maybe use the Devonian to start as that was the turning point leading reptiles to rise as the oxygen rich planet drys out and cools, maybe make it so earths climate never changes therefore not causing the Arthropods rule to not decline (land nor sea nor air)

[lightron]

I love you for this quote at 3:50: "The common conception was that mammals simply appeared out of nowhere during the jurassic"
This perfectly embodies my frustration with pop-culture palaeontology and biology (even in schools)
So thank you very, very much for making this video and sharing the fascinating creatures that are the therapsids (and mammals for that matter) with the world!

[WizardToby]

"The Great Dying"
What a name for an extinction event

[alejandroelluxray]

Evolution: *EXECUTE ORDER 66* (The Great Dying)

Earth: *YES MY LORD*

[frankdecron]

I was just reading new dinosaurs by Dixon and more alternative prehistory is really cool for me right now. Great stuff, cheers!

[IReallyLikeTreessmileyface]

11:17 so they would've evolved into some weird off brand sangheli? (elites from halo)

[The_Wonders_of_Engineering]

I've always loved speculative zoology and not enough channels go into it as a subject. Thank you!

[domino_]

Theory: Humanity is replaced by some kind of Dinosuar descendant.

[badoodadoodadoo]

Hey, do “If the Emus joined the Axis Powers in WW2.” Please. I need to see some Emus in freaking Panthers / Tigers

[storytellerofwilds]

Oh my god, that was incredible. Just the way you narrate with your voice is so captivating...