8 Ways Evolution Has Royally Screwed You Over

5. Your Organs Are Unsupported

Continuing with our theme of it's-a-bad-idea-to-walk-on-two-legs, upright walking has meant that our internal organs are piled on top of one another like a meaty laundry pile.

In our quadrupedal cousins, the abdominal wall acts as a cosy hammock for the gizzards and provides excellent support during running or any kind of exertion and their position generally prevents them from putting too much pressure on each other.

In humans, however, our organs are rather poorly supported. This is generally thought to be one of the possible causes of those horrible side-pains we get during exercise. The organs, which are supported by tendons as opposed to the abdominal wall, jiggle up and down, tugging on your innards and causing sharp pains.

Another side-effect of our internal balancing act is one that mostly affects the gents. Because mens' testicles have to make their way from inside to outside the abdominal cavity in the first year of life (another genius idea by human evolution), guys have little holes in their abs for them to exit through. The additional pressure exerted by the organs can cause the intestines to occasionally slither through these weak spots during heavy exertion, to form an inguinal hernia.