Prehistoric animals you won't believe existed

Megatherium: This animal was a giant sloth living during the Miocene and Pleistocene epochs.

Gigantopithecus: This extinct animal lived on the planet between six million and 200,000 years ago. 

Canis Dirus: Although it is related to the gray wolf and dog, the animal is not actually an ancestor of either of these species.

Canis Dirus: The Dire wolf lived during the Pleistocene epoch and is believed to have gone extinct 10 thousand years ago.

Livyatan melvillei: According to Newdinosaurs, it lived approximately 13 million years ago.

Livyatan melvillei: This species is similar to a whale and is yet another mysterious animal.

Mammoth: These animals, similar to modern-day elephants.

Mammoth: According to Newdinosaurs, the woolly mammoth went extinct "just" 4,500 years ago.

Smilodon: The giant cat is believed to have emerged in North America.

Smilodon: Also known as the saber-toothed tiger, this species lived during the Pleistocene epoch. 

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