Welcome to Top10Archive! We should probably be thanking our lucky stars. You see, most of the animals we have to live around are docile, adorable and snuggly creatures, but that wasn’t always the case. Before the appearance of man, the world was once a breeding ground for terror and monsters.
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10. Entelodon
9. Dunkleosteus
8. Inostrancevia
7. Spinosaurus
6. Pulmonoscorpius
5. Quetzalcoatlus
4. Titanoboa
3. Phorusrhacidae
2. Megalodon
1. Arthropleura
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