This is an interesting article about mice. Apparently if you remove one key gene from a mouse’s DNA, it becomes a much more impulsive, wild mouse. Mice are perfect for this experiment because they are naturally non-aggressive beings. Unlike many animals such as dogs, bulls, and especially humans, not much seems to anger a mouse. For certain human beings with a pathetic DNA structure (aka, those who are naturally angry and lash out at others), survival actually becomes more difficult because the brain isn’t designed to handle certain types of stress. In another study (which I will find the link for eventually), scientists proved that dogs that tend to be overly aggressive are much less intelligent than a calm dog. Similar tests have been done on humans to prove that aggressive humans can be up to 27 IQ points lower than the average human!
http://www.pheedo.com/click.phdo?i=6124612778203513da1433185f5ed2df
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