4. The Toothy Hadrosaurus
The only skeleton of the Hadrosaurus was found in 1868, in New Jersey where it became the state dino in 1991. Its name means “bulky lizard” and it is quite a unique dinosaur as it had over 1,000 teeth that were constantly replacing themselves. Most dinos had one set that they were stuck with for life, but not this toothy beast–if one broke, it didn’t matter there were hundreds ready to take on chewing.