The question you're asking yourself right now is why aren't 'stupid people' on the list.

One would do well to point out that for as amazing as the human body is, that this finely tunned machine of thousands of large and small and tiny parts that function together to allow one of the most complex of all creatures to walk the Earth has more than a few spare parts that really aren't necessary. These vestigial items, for the most part, are more trouble than they're worth. That said, some are remnants of some very cool functions from our less evolved days. Just a few of them are listed below.

• Appendix
• Paranasal Sinuses
• Coccyx
• Third Eyelid
• Palmaris Muscle
• Wisdom Teeth
• Body Hair
• Thirteenth Rib...
  
  

What Evolution Left Behind on Humans. [decimation.com]