25 Terrifying Dinosaurs You’ll Be Glad Are Extinct

Ruling our planet as the dominant terrestrial vertebrates for 135 million years, dinosaurs were the largest creatures that ever inhabited Earth. The biggest sauropod dinosaurs may have achieved lengths of 190 feet and heights of over 30 feet, which is, in modern terms, an incredible size. Not all dinosaurs were that large; there were creatures just about 20 inches long but even these little beasts usually looked scary. From the little known Mapusarous to the legendary Tyrannosaurus Rex, check out these 25 terrifying dinosaurs.

Here's a preview:

Gorgosaurus
Dracorex
Triceratops
Kronosaurus
Ankylosaurus
Liopleurodon
Giganotosaurus
Quetzalcoatlus
Ichthyosaurus
Tyrannosaurus
Moschops
Utahraptor
Gorgonopsid
Plesiosaurus
Allosaurus
Stegosaurus
Phorusrhacid
Mapusaurus
Entelodon
Spinosaurus
Argentinosaurus
Carnotaurus
Pteranodon
Rajasaurus
Estemmenosuchus

[TheRealXboxNerd]

Sorry, but none of the marine reptiles or pterosaurs mentioned here are dinosaurs... Great vid apart from that though :D

[list]

PS.  We'll be featuring a bloopers channel soon, so keep an eye out for that :) 

[barbararevill]

so bad. some aren't even dinosaurs, and the pictures are so inaccurate. ugh

[mojotheaverage]

Great list but a lot of the pictures are really out of date. Also the p in pterosaur is silent and giganotosaurus is pronounced as if spelt 'jigganotosaurus'. Sorry, I was obsessed with dinosaurs as a kid!

[list]

Ait guys.  Gone on a run (working on my fitness you know Lol).  Ill be back later on though so if you want to leave me a comment, be sure to do so :).  Thank you for all the awesome comments and have an awesome day. 

[Thoomas]

Estemmenosuchus...

Did the scientists have diarrhea or something?!

[Sunhawkajj]

Its not a dinosaur but the thing I am most glad are extinct are 4 inch long blood sucking prehistoric

[anglx_xdvst]

These weren't scary or terrifying.And some of the "dinosaurs" Aren't even dinosaurs

[SalSwan]

"dinosaurs" that arnt dinosaurs says list
1. kronosaurus (marine reptile)

2. liopleurodon (marine reptile

3. quetzalcoatlus (pterosaur)

4. ichtyosuarus (marine reptile)

5. moschops (mammal like reptile)

6. gorgonopsid (mammal like reptile)

7. plesiosaur (plesiosaur there is different species than just plesiosaur)

8. photusracid (terror bird which are dinosaurs so...)

9. enteladon (mammal)

10. pteranodon (pterosaur)

11. estnemenosuchus or the last one I butchered the spelling.... (mammal like reptile)

[Nick-rdqr]

I like the new guy better because he has a better voice, doesn't sound boring, does better editing and actually listens to the comments.

[vellichorondepop]

2:29 looks like he got rejected for prom.. Flowers in his hands and everything :(

[PowerHouseProdigy]

You should have really named this list "25 prehistoric animals you'll be glad are extinct" Not only do you have non-dinosaur reptiles such as plesiosaurs and pterosaurs on the list, but you even have prehistoric mammals like entelodon.

[edjimenez]

I like top 25 list because they take the time to talk with there subs and actuallt reply to their subscribers comments even with over 1 million subs. Thanks for your time and thanks for being such a great youtube channel keep the videos coming :D

[jujubts]

Estemmenosuchus insint a dinosaur is an ancient reptile

[Clucky]

Honestly? I think we would manage if some of these still lived, if anything i think that would have been good. If they kept us from settling too agressively, and give us pause in some of our "business" decisions, like cutting down massive important life-giving forests for a bit of wood.. And if we settle in less areas, keeping our population down, we have a much smaller need of taking all these resources, without letting it regrow or recover, effectively killing the land. Just a matter of time until we are out of resources.. That and it would be amazing to see some of these magnificent and majestic creatures.. But i think i got into too much detail with this comment.. Welp, i do not have the heart to remove it. :/

[polterghast]

These Are The "Dinosaurs" On This List That Aren't Actually Dinosaurs:

[manicmatt]

i subsribed!!! to you list 25 your a awesome youtuber and i liked this video and turned on notifications bell

[khkikqm]

I like how Juan is so active with his subs. The last guy barely ever commented and it was usually just to say to go check out more videos. Good job Juan :)

[Creeperlabs]

why is entelodon on here?!? its a mammal!!

[pikachurules]

For a list of dinosaurs its surprising how many creatures on here were not dinosaurs.