If you still have your appendix and all of your wisdom teeth in your body, consider yourself lucky. You have a seven percent chance of developing an appendicitis in your lifetime and a whopping 85 percent chance of having at least one impacted wisdom tooth. Both of these things require surgery.
Not only can you live without these features, but you live better without them. All they do is get in the way and/or get infected. They're just pointless extra bullshit.
In both cases it appears to be leftover equipment from an era when we used to eat a lot more leaves, before we converted to our modern burrito-based diet.
Although some of us prefer enchiritos.
Your wisdom teeth get impacted and infected because you don't have room for them, and you don't have room for them because they came about when earlier versions of humans had larger jaws, which were more suited to chewing up plant matter. Grinding up leaves as opposed to soft meat and/or pizza is hard work and it requires more teeth to spread out the load. Especially because you have to eat so much of it.
Salad isn't generally considered "filling."
As for the appendix, the most popular theory is that it once helped in digesting all these greens. It's an extension of the cecum, an organ that is much larger in herbivores than carnivores because it's used to break down the tremendous amount cellulose they take in. Since we no longer have a need for this extension of the cecum, it has shrunk into a vestigial organ that looks like a worm. That's just one theory. There actually hasn't been all that much study into the appendix because, you know, who gives a shit what it does.
For more things evolution left us to deal with, check out 6 Insane Dog Behaviors Explained by Evolution and 6 Formerly Kickass Creatures Ruined by Evolution.
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