3. They live in the default position
There is a neurological explanation as to why some people end up being so negative. It has to do with the part of the brain called the amygdala, which functions as an alarm and is constantly on the look out for danger, fear and bad news. Scientists believe this to be the brain’s default position. In evolutionary terms, this is understandable; it is all part of the fear-flight mechanism in which the brain uses most of its neurons to keep up with all the bad news that is stored in the memory.