Dogs chew on just about anything—shoes, sticks, furniture, even things that shouldn’t be in their mouths. And although chewing is a natural habit, not everything they gnaw on is safe for their teeth.

Despite acknowledgement of the negative environmental impact of discarded gum, impacts on health have largely gone unreported. Here, Cuong Cao from Queen’s University Belfast and founder of Nuud Keir ...

Birds, unlike their dinosaur ancestors, lack teeth, relying on beaks and gizzards for eating. Some birds have evolved tooth-like adaptations for gripping prey. Mammals like the giant armadillo boast ...