A ghost ( phantom, apparition or spook) is the soul or spirit of a dead person or animal that can appear, in visible form or other manifestation, to the living. Descriptions of the apparition of ghosts vary widely from an invisible presence to translucent or barely visible wispy shapes, to realistic, lifelike visions.
Although the human soul was sometimes symbolically or literally depicted in ancient cultures as a bird or other animal, it appears to have been widely held that the soul was an exact reproduction of the body in every feature, even down to clothing the person wore. This is depicted in artwork from various ancient cultures, including such works as the Egyptian Book of the Dead, which shows deceased people in the afterlife appearing much as they did before death, including the style of dress.
Ghosts and the afterlife
Fear of ghosts
While deceased ancestors are universally regarded as venerable, and often imagined as having a continued presence in some sort of afterlife, the spirit of a deceased person which remains present in the material world (viz. a ghost) is regarded as an unnatural or undesirable state of affairs and the idea of ghosts orrevenants is associated with a reaction of fear. This is universally the case in pre-modern folk cultures, but fear of ghosts also remains an integral aspect of the modern ghost story, Gothic horror, and other horror fiction dealing with the supernatural.
History
There are many references to ghosts in Mesopotamian religions – the religions of Sumer, Babylon, Assyria and other early states in Mesopotamia. Traces of these beliefs survive in the laterAbrahamic religions that came to dominate the region.[26] Ghosts were thought to be created at time of death, taking on the memory and personality of the dead person. They traveled to the netherworld, where they were assigned a position, and led an existence similar in some ways to that of the living. Relatives of the dead were expected to make offerings of food and drink to the dead to ease their conditions. If they did not, the ghosts could inflict misfortune and illness on the living. Traditional healing practices ascribed a variety of illnesses to the action of ghosts, while others were caused by gods or demons.
The ancient Romans believed a ghost could be used to exact revenge on an enemy by scratching a curse on a piece of lead or pottery and placing it into a grave.
Ghosts reported in medieval Europe tended to fall into two categories: the souls of the dead, or demons. The souls of the dead returned for a specific purpose. Demonic ghosts were those which existed only to torment or tempt the living. The living could tell them apart by demanding their purpose in the name of Jesus Christ. The soul of a dead person would divulge their mission, while a demonic ghost would be banished at the sound of the Holy Name.
There was widespread belief in ghosts in ancient Egyptian culture in the sense of the continued existence of the soul and spirit after death, with the ability to assist or harm the living, and the possibility of a second death. Over a period of more than 2,500 years, Egyptian beliefs about the nature of the afterlife evolved constantly. Many of these beliefs were recorded in inscriptions, papyrus scrolls and tomb paintings. The Egyptian Book of the Dead compiles some of the beliefs from different periods of ancient Egyptian history.[28] In modern times, the fanciful concept of a mummy coming back to life and wreaking vengeance when disturbed has spawned a whole genre of horror stories and films.
Sceintific views
The physician John Ferriar wrote An essay towards a theory of apparitions in 1813 in which he argued that sightings of ghosts were the result of optical illusions. Later the French physician Alexandre Jacques François Brière de Boismont published On Hallucinations: Or, the Rational History of Apparitions, Dreams, Ecstasy, Magnetism, and Somnambulism in 1845 in which he claimed sightings of ghosts were the result of hallucinations.
Joe Nickell of the Committee for Skeptical Inquiry, wrote that there was no credible scientific evidence that any location was inhabited by spirits of the dead. Limitations of human perceptionand ordinary physical explanations can account for ghost sightings; for example, air pressure changes in a home causing doors to slam, or lights from a passing car reflected through a window at night. Pareidolia, an innate tendency to recognize patterns in random perceptions, is what some skeptics believe causes people to believe that they have 'seen ghosts'. Reports of ghosts "seen out of the corner of the eye" may be accounted for by the sensitivity of human peripheral vision. According to Nickell, peripheral vision can easily mislead, especially late at night when the brain is tired and more likely to misinterpret sights and sounds."
According to research in anomalistic psychology visions of ghosts may arise from hypnagogic hallucinations ("waking dreams" which are experienced in the transitional states to and fromsleep). In a study of two experiments into alleged hauntings (Wiseman et al. 2003) came to the conclusion "that people consistently report unusual experiences in ‘haunted’ areas because of environmental factors, which may differ across locations." Some of these factors included "the variance of local magnetic Žfields, size of location and lighting level stimuli of which witnesses may not be consciously aware"
Some researchers, such as Michael Persinger of Laurentian University, Canada, have speculated that changes in geomagnetic fields (created, e.g., by tectonic stresses in the Earth's crust orsolar activity) could stimulate the brain's temporal lobes and produce many of the experiences associated with hauntings. Sound is thought to be another cause of supposed sightings. Richard Lord and Richard Wiseman have concluded that infrasound can cause humans to experience bizarre feelings in a room, such as anxiety, extreme sorrow, a feeling of being watched, or even the chills. Carbon monoxide poisoning, which can cause changes in perception of the visual and auditory systems, was speculated upon as a possible explanation for haunted houses as early as 1921.
