The earliest known reports of poltergeists date back to the ancient Romans. Other poltergeist records can be found in the medieval times of China and Germany. The reports indicate unexplainable events such as throwing dirt, flying objects, awful smells, loud noises, unexplained lights and ghostly apparitions. All of which are very similar to the still ongoing reports of modern poltergeists. Why exactly poltergeist activity occurs has been under debate by experts and scientists for decades.
Poltergeists usually begin and end abruptly.
The typical incident can last for several hours or several years. There have been hundreds of independent studies done on poltergeists. A majority of the cases revolve around on individual or Agent, as they are called. The studies have discovered that most of the poltergeist agents are females under the age of twenty who are totally unaware that they are involuntarily directing the poltergeist energy. While still not much is known about the way that poltergeist work the investigations have uncovered a link between the agents and states of poor mental or physical health.