There are few things scarier for a PC gamer than the possibility of one of your peripherals spontaneously combusting and ...

When a person has black or dark-colored mucus, they may have inhaled potentially harmful pollutants. Coughing up black mucus may also be due to an underlying infection or condition. Mucus serves ...

Black rain is a phenomenon that occurs when soot and other contaminating particles present in the atmosphere mix with moisture and precipitate in the form of rain.