Check out these Amazing EXTINCT Animals You Probably Never Heard Of! From giant turtles to unicorns, this top 10 list of mysterious creatures forced into extinction has some of the biggest animals that ever lived!

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10. Carbonemys
The Carbonemys was a turtle that grew to be the size of a small car, that lived around 60 million years ago during the Paleocene Period. The first evidence of this species was found in a coal mine in Colombia in 2005, which is why it was given this name, which means ‘coal turtle’.

9. Arctotherium angustidens
Standing at up to eleven feet tall, and weighing up to 4,500 pounds- the Arctotherium angustidens was, as far as we know, the largest species of bear to have ever lived. Living across South America, it was at least 1,000 pounds heavier than the largest bears that live today, and 9 times heavier than its closest relative that’s still around- the spectacled bear.

8. Quagga
The Quagga was a type of zebra from South Africa, but unlike those that you see today, the Quagga’s stripes faded below its neck. It was once thought to be a completely different species, but recent analysis has shown it to be a subspecies of the plains zebra.

7. Cygnus Falconeri
Swans are found in temperate environments around the world, and while they are certainly one of the largest birds you’ll see on a river, they used to be a whole lot bigger!

6. Steller’s Sea Cow
Sailing the oceans you might expect to encounter various large creatures, but there was one that sailors would often come across- that was until, of course, they were hunted to extinction. Known as Steller’s sea cow, they were a relative of manatees and dugongs, just much much bigger. While manatees may grow to up to 13 feet long, Steller’s sea cows could grow to up to 33 feet- with estimates of their weight ranging between 9000 and 24,000 pounds.

5. Meganeura
The Meganeura was the largest of many species of giant dragonfly-looking creatures that lived about 300 million years ago. They were the biggest known flying insect to have ever lived, with a wingspan of up to 26 inches. The first fossil specimen was found in France in 1880, and since then many more have been found.

4. Elasmotherium
While you might think unicorns are simply animals of legend, there was a creature that used to walk the lands across Eurasia that looked very similar to one. The Elasmotherium, also known as the Giant Rhinoceros, or the Siberian Unicorn, lived between around 3 million years ago to 29,000 years ago. They were 6 and a half feet tall, almost 15 feet long, and could weigh up to 4 and a half US tons!

3. Ledumahadi mafube
The Ledumahadi mafube, was a dinosaur that lived around South Africa about 200 million years ago. Its name means ‘a giant thunderclap at dawn' in Sesotho, the language that's spoken in the region where the remains of this giant were found, and it's clear to see why. It's thought to have been the largest animal to be alive at the time and was related to the brontosaurus. It weighed as much as 26,000 pounds and was twice the size of an African elephant.

2. Titanoboa
If you’re not too keen on snakes, then this next one is probably going to be a problem for you. 58 million years ago, just a few million years after the fall of the dinosaurs, northern Colombia was a massive swampy jungle, where it was much hotter and wetter than it is today. These conditions allowed giant creatures to thrive- huge turtles, giant crocodiles, and the biggest of them all… the Titanoboa.

1. Gigantopithecus
There have been a large number of different species of primates, with some estimates claiming there are as many as 448 on the earth today, but there's a debate between researchers as to the true number. One thing that is certain, though, is that the largest primate species have long been extinct, and the biggest to have ever walked the earth is known as the Gigantopithecus blacki.

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