And to touch up on evolution. We are still evolving today. It just takes a long time. A thing to look at. Back when we were "cavemen" our wisdom teeth were not required to come out. Why is this you may ask? Because our mouths were bigger, and able to hold those four extra teeth. Now thousands of years later, after our mouths shrinking a little bit, and not being able to contain our wisdom teeth... Some are not growing them. Some people have 3 wisdom teeth rather than 4... And others have only 2. This is a small sign of evolution. After a few more thousand years, we will eventually not have any wisdom teeth that require to be removed.