Learn how birds evolved to rely on their beaks, not teeth, to eat, and how their digestion differs from how humans and other ...

Teeth help animals bite and chew food. Meat-eating carnivores tend to have sharp teeth to sink into their prey, while ...

A man who never lets you down is special. He doesn’t want to make you feel anxious or unhappy. When he loves you in a way ...

Dental fillings aren't a pleasant way to fix cavities but they're necessary to fill holes and prevent further damage. But now ...

Saliva genes evolved faster than most body systems, revealing how food, pathogens, and environment shaped the modern human ...