Normally, the body is able to keep the sinuses clean and healthy, despite the dark, moist environment that bacteria love. However, when conditions are right, bacteria can grow out of control in the sinuses, causing a sinus infection. One cause of sinus infections is the common cold.
It has been established that there are two major patterns of human behavior that reflect two modes of brain operation: 1  Survival-Oriented Behavior (SOB). Controlled by primitive areas in the middle of the brain.  Balanced-Empathic Behavior (BEB) .
One newsletter deemed by some to be one of the most important on survivalism and survivalist retreats in the 1970s was the Personal Survival (P.S.) Letter (circa 1977â1982). Published by Mel Tappan, who also authored the books Survival Guns and Tappan on Survival.