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) .
Survival mode, with a diamond pickaxe in hand and a house in background. Survival is the original game mode of Minecraft. Until mid-Alpha, Survival was the only available mode besides Classic creative mode. Survival may be played online or offline, as long as the user has initially played it while connected to the Internet (which allows game files to download to their computer).