Somewhere in Australia, a child is wobbling a baby tooth loose as an adult tooth pushes up behind it. For one in seven Aussie kids, that new tooth arrives already weak, marked with a creamy white or ...

Among Zulu communities, children may throw their fallen milk teeth onto the roof, a custom deeply connected to beliefs about growth, transition and the arrival of stronger adult teeth.

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 ...