For centuries, and perchance still from the beginning of evolved human existence we have believed in life behind death, surviving to enter heaven, hell or purgatory, or as some believe, destined to stay on earth in ghostly form, without a physical body, lingering the house they grew up in, or the site they were murdered. From the Shakespeare play MacBeth to the NBC show "Medium," spirits of the dead have long made a look in our culture and tradition.
While science still cannot determine whether or not ghosts exist, there has been a huge amount of research done in recent years by paranormal investigators. The most common belief among these investigators is that ghosts do exist, either in intelligent spirit form or as more of a “tape recording”, called a residual lingering by those in the field.
Although ultimate proof for the survival of ghosts remains elusive, sincere eyewitnesses continue to report seeing, photographing, and even communicating with ghosts. Ghost investigators expect to one day prove that the dead can contact the living, providing a final respond to the mystery.