Biohazard labels have been around for quite some time now, having been developed to designate or warn about hazardous materials, locations, or objects within the immediate vicinity. They are most often found around nuclear waste, specifically nuclear reactor facilities or weapons of mass destruction. Many of these biohazard signs come in a variety of different colors, backgrounds, borders, or alongside supplemental information that specifies the type of hazard in the surrounding area. Most individuals are familiar with the most traditional sign, which features a circular, black and white symbol. Many also known of the simple skull and crossbones, which is generally a symbol for lethal danger or poison.