Teeth are one of nature’s most useful tools, helping animals bite, tear, and grind their food. Mammals, reptiles, and even some amphibians rely on them daily, but birds are the exception. Modern birds ...

Here’s what you’ll learn when you read this story: While bones can regrow themselves when they break, teeth aren’t so lucky, and that leads to millions of people worldwide suffering from some form of ...

Teeth help animals bite and chew food. Meat-eating carnivores tend to have sharp teeth to sink into their prey, while herbivores tend to have flatter teeth to grind down their plant-based meals. Some ...