Take a look at this electric fireplace shelf. The fireplace is somewhat mysterious because it is connected to the chimney, which is a passage between the outside world and the inside world. People sit by the fireplace and watch the fire change, and they can predict the weather outside the house. If the fire is pale or has a lot of abnormal sparks, or the ash clumps or sudden ash falls, it is a sign of rain. If a fire is buzzing or a flue is popping and winds are stronger than usual, a storm is on the way. If the flames burn more fiercely, frost is predicted. The fireplace thus became a real medium connecting the inside and the outside.