The Only Dinosaur That T. Rex Was Scared Of

The Tyrannosaurus Rex is known as the king of the dinosaurs and ruler of Cretaceous North America. However, there was another king that lived along the Rex, and it was no carnivore, this was the Ankylosaurus

If you want more ExtinctZoo 🦖:

0:00 Intro
0:58 Discovery & Naming
1:41 Classification
2:23 Body Size
3:07 Why It Was So Heavy
3:33 Overpowered Armor
4:20 How Its Armor Was Different Compared To Other Ankylosaurs
5:08 Was Ankylosaurus Bulletproof?
5:45 How Hard Could It Swing Its Tail Club?
7:11 How It Used Its Club
9:02 Juvenile Ankylosaurus Weaknesses
9:40 Did It Live In Herds?
10:13 Diet and How Much It Ate
11:00 Its Strange Sharp Teeth
11:22 The Reason Its Belly Was SO SO wide
12:00 Smell & Eyesight
12:30 Walking/Running Speed
12:53 Range & Habitat
13:11 Animals It Lived With
14:46 Flora Of Hell Creek & Climate
15:17 Mystery Of Ankylosaurus Being So Rare
15:34 Extinction

Artwork in thumbnail by Damir G Martin

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[urbanshadow]

I remember having a book when I was a kid showing a T-rex fighting a stegosaurus. It blew my mind when I found out that we live closer in time to the T-rex than the T-rex lived to Stegosaurus.

[bradleyanderson]

The "I'll break your ankles" saurus.

[olufagosebambulagose]

Imagine being so badass that evolution not only gives you natural heavy plate armor but also a war hammer.

[jamesrussell]

Predators like T. rex would have learned early in life to go after easier prey. After all, having just two legs, if it suffered a broken bone in one of it's lower legs from an Ankylosaurus club, that would be a death sentence. And as I think about it, populations of Ankylosaurus wouldn't need large numbers to survive as a genus (species?) due to a very low predation rate once achieving adulthood. A pretty ingenious animal.

[billyskittles]

T. Rex more than likely wasn’t scared of it, but probably knew it wasn’t able to get past the armor so it didn’t waste its time.

[kruaser]

I would argue that if a T-rex was desperate enough to attack a full grown Ankylosaurus, and had its leg shattered, there is a very slim chance it would hobble towards an area that would be ideal for fossilization like a swamp or someplace where two working legs are necessary.

[bluemilkalienmonster]

Ankylosaurus is my favorite dinosaur, always has been, always will be

[briangates]

I'm surprised you haven't heard of the ankylosaur "mummy" found in Canada. It was a type of Nodosaur. It's scales, spikes, and plates were absurdly well preserved. Look into it.

[youyoutobio]

I wonder how much pain and broken bones his ancestors had to endure for this beast to develop this massive armour

[furioussherman]

Ankylosaurus strikes me as a dinosaur that best embodies the concept of personal space. The fact that it was essentially an armoured tank armed with a literal wrecking ball strikes me as not the sort of thing that a particularly sociable animal would have.

[oldcremona]

The one dinosaur T-Rex was afraid of was Mrs. T-Rex.

[DavidL]

8:02 was savage.. he couldnt even be bothered to get up to do it 🤣

[Saurophaganax]

Only five incomplete Ankylosaurus specimens have ever been found. Contrast that to the literal tens of thousands of Edmontosaurus and Triceratops specimens that have been discovered, and it’s no surprise that we haven’t any Ankylosaurus specimens with T. rex bite marks on them. It’s not because T. rex never fed on them. It’s because the available sample size for Ankylosaurus specimens is so insanely tiny that the likelihood of finding any evidence of feeding on them would be a statistical wonder.

[charlierex]

I love Ankylosaurus and Tyrannosaurus- two amazing dinosaurs.

[igvtec]

Ever since, I found out about Ankylosaurus. I thought it was a impressive beast of a dinosaur.

[Feckinpaddy]

Ankylosaurs have always been my favorite kind of dinosaur. They're like easily underestimated, not very bright, grumpy armored tanks.
There is something about them I find oddly adorable.

[JabberCT]

Since they were herbivores, I wonder if they ever used their clubs for slamming tree trunks to make leaves fall when times are tough?

[davidanderson_surrey_bc]

Servosaurus: Welcome to Jurassic Restaurant! What'll you have?
Ankylosaurus: How about a club sandwich?
Servosaurus: You're in luck! That's our bony-plate special of the day.

[MrSCOTTtheSCOT]

AS we monkeys know stubbing your toe on a door or chair leg or grinding your shin or ankle bone off the lowered dishwasher door, the thought of been smacked by that club, i dont doubt the T rex just knew to not bother attacking the Rock

[dysonkennedy]

Hey, great vid. Physicist here!Just wanted to point out that Impulse is measured in N*s (Newton-seconds) not N/s (Newtons per second)