The first teeth were sensory organs on the skin of ancient fish

Teeth are good for chewing and biting, but they are also sensitive – and that may have been their original function hundreds of millions of years ago

​Teeth are good for chewing and biting, but they are also sensitive – and that may have been their original function hundreds of millions of years ago Teeth are good for chewing and biting, but they are also sensitive – and that may have been their original function hundreds of millions of years ago