Infant jaws are too small to accommodate adult-sized teeth, so smaller teeth are necessary until the jaw grows to its mature size.
Some researchers are now considering the hypothesis that human speech evolved not from primate sounds but more from monkey facial gestures.
Why do humans have wisdom teeth? What is so wise about them?
If you are grinding your teeth you could be wearing the enamel down, as well as causing damage to your jaw. When we’re asleep, we’re capable of grinding our teeth six times as hard as we might in the day. That kind of pressure can do a lot of damage.