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Jacob SheltonUpdated December 23, 2019 • 14.5k votes • 3k voters • 156.2k views • 20 items

List RulesVote up the most terrifying extinct beasts.

If you think the modern animal kingdom is frightening, then wait until you get a load of the animals that existed millions of years ago. Most of the scariest

creatures that used to really exist are related to animals we live with now; however, the animals we're glad are extinct were bigger and scarier - and for some

reason, most of them had buzzsaw-like teeth. 

Many of the scariest extinct animals are similar to dinosaurs. Some existed alongside the T-Rex, while others arrived post-asteroid and exhibited some of

the dinosaur’s most frightening attributes. Many of the massive extinct animals have descendants alive today (a large number of them live in Australia),

although they’re hardly as dangerous as their ancestors from millions of years ago. 

1 Titanoboa1,688 VOTES

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Size: 40 feet long

When They Lived: 58 million years ago

Distinguishing Features: Obviously this is a very large snake. Not only did it grow to 40 feet in length, but it alsoweighed more than a ton. These giant snakes ruled the jungle and moved through swamps with ease.

Is this a scary monster?1,352 336

2 Megalodon1,567 VOTES

Photo: Ryan Somma/�ickr/CC-BY 2.0

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Size: 50 feet long

When They Lived: 400 million years ago

Distinguishing Features: Megalodons were big boys. Not only were they 50 feet in length, but they also weighedup to 50 tons. Because sharks are made of cartilage, they don't leave fossils behind. Instead, researchers have touse tooth size as a comparison tool. 

Is this a scary monster?1,257 310

3 Deinosuchus1,279 VOTES

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Size: About 3 feet long

When They Lived: Between 6 million and 10 million years ago

Distinguishing Features: Piranhas are scary; Megapiranha was downright terrifying. Not only were these �shabout 3 feet long, but they also weighed between 20 and 30 pounds. That's a big �sh. Aside from its actual size,Megapiranha's jaw could generate up to 72 pounds of force. That means it could take a huge bite out of anyanimal that was unlucky enough to pass by. 

Is this a scary monster?839 208

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5 Dunkleosteus919 VOTES

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Size: 26 to 32 feet long

When They Lived: Late Devonian (roughly 360-370 million years ago)

Distinguishing Features: These large, angry �sh were built to hunt. They were some of the meanest predators inthe water, and with their protected heads, they were hard to take down. Dunkleosteus didn't have actual teeth;however, it did have giant, sharp bones protruding from its mouth that were ready to chomp whatever was infront of the �sh. 

Is this a scary monster?738 181

6 Sarcosuchus

Size: 40 feet long

When They Lived: 110 million years ago

822 VOTES

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Size: 36 feet long

When They Lived: 72-83 million years ago

Distinguishing Features: This huge alligator weighed about 7 tons and feasted on dinosaurs similar in size,which means their jaws had enough power to take down a gigantic screaming lizard. 

Is this a scary monster?1,030 249

4 Megapiranha1,047 VOTES

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Distinguishing Features: Crocodiles of the prehistoric era were absolutely terrifying. This speci�ccreature had 132 conical teeth that have been compared to "railroad spikes." Unlike many carnivores who havenarrow teeth that are made for slashing, Sarcosuchus's teeth were designed to grip its prey. While Sarcosuchuswasn't �exible, it was covered with bony armor that helped protect it from enemies. 

Is this a scary monster?659 163

7 Arctodus

Size: 9.5 feet long

When They Lived: 800-11,000 years ago

Distinguishing Features: This short-faced bear sounds cute; however, it was nearly as tall as a basketball hoop.The bears were bigger than any bear that's alive today, and their claw marks have been found on cave walls up to16 feet above the ground. The bears lived in North America, with most of them roaming around what is nowCalifornia. 

743 VOTES

Is this a scary monster?596 147

8 Euphoberia Armigera717 VOTES

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Size: 3 feet long

When They Lived: Late Triassic Period (roughly 250 million years ago)

Distinguishing Features: These weren't just giant millipedes, they were among the biggest arthropods to everwalk the Earth. The average size of a modern millipede is about an inch in length, which means that over thecourse of hundreds of millions of years, the arthropod family has shrunk down from the absolutely unimaginableto the manageable yet still gross. 

Is this a scary monster?560 157

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Filed Under: Animals / Plants > Science, Top 20, Graveyard Shift, Ancient Flora / Fauna

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