Teeth are amazing -- the product of half a billion years of evolution. They provide fuel for the body by breaking apart other living things; and they must do it again and again over a lifetime without breaking in the process. This means that plants and animals have developed tough or hard tissues for protection, and teeth have evolved ways to sharpen or strengthen themselves to overcome those defenses. And just as different jobs require different tools, animals with different diets have different shaped teeth to deal with the variety of foods that they eat.
In this Very Short...