You can't feed a lion grass!! He's got the wrong sort of teeth! Animals which eat plants have teeth like this. They're shaped to squash and grind. Meat eating animals have teeth like this ...

But many animals don't have this problem ... you can eventually regrow entire teeth. Though no human testing has been done, yet. So continue to see your dentist! At least for the time being.

In a river of eastern Brazil, an “armored” creature swam along searching for the next meal to sink its “copper colored” teeth ... but no one had studied the animals in detail — until ...