Ghost

A ghost is an alleged disembodied spirit of a dead persons. Ghosts are often depicted as inhabiting haunted houses, especially houses where murders have occurred. Why some murder victims would stick around for eternity to haunt a place while others seem to evaporate is one of the great mysteries of existence.

Many people report physical changes in haunted places, especially a feeling of a presence accompanied by temperature drop and hearing unaccountable sounds. They are not imagining things. Most hauntings occur in old buildings, which tend to be drafty. Scientists who have investigated haunted places account for both the temperature changes and the sounds by finding sources of the drafts, such as empty spaces behind walls or currents set in motion by low frequency sound waves produced by such mundane objects as extraction fans.