Graveyard Shift

Massive Extinct Animals, Ranked By How Horrifying They Are

List Rules
Vote 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.