If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have ...

The humble chin, that bony protrusion at the bottom of your face, is a mysterious little body part that is a surprising source of controversy among researchers.

A receding chin can also happen as part of a condition that’s present from birth (called congenital). These things can be dangerous if they affect the ability to breathe or eat.

A numb chin is generally a sign of disorder within the nerves of the face. Keep reading to learn about 9 of the more common causes of a numb chin.