Ghosts are the spirits of a dead people who are capable of making themselves seen or heard by the living. The belief and worship of ghosts was common in ancient societies and is still found today. In Europe the belief in ghosts goes back to ancient times and was widespread during the middle ages. The belief declined and was the revived when spiritualism came in vogue. Ghosts seem to differ from culture to culture. The ycould be solid or transparent in the likeness of a deceased, strange lights, or a disembodied voice. poltergeists are ghosts that disrupt the living by moving or breaking objects. There is now evidence that ghosts exist.