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 ...

How did two sets become standard for human beings?

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Christina Nicholas, University of Illinois Chicago and David Avenetti, University of ...