These are generally thought of as the apparition (the appearance of) or spirit of someone or some thing that is no longer living. Many theorize that a ghost is simply caught between the world of the living and the afterlife. Possibly confused about their own death. This is why many people believe that ghosts are often found in places of terrible tragedy and sudden death. Other theories regard ghosts as just another form of energy. We are all made up of energy. Some scientists believe that energy doesn’t die, but simply changes form. Ghosts could be the same energy in a new form, without a physical body. Another theory is that ghosts are only imprints left on the atmosphere around us by what some call our “life force”. Although there may be no definite explanation for what a ghost is, it is hard to deny that there is definitely something about them that has captured the minds of millions. With thousands of reported sightings and encounters for centuries, it is also hard to deny that ghosts just might be real. The thought of a ghost being real is scary to some and fascinating to others. Can they see us? Do they hear us when we speak? There are different types of ghosts that people have reported encounters with as well. History will tell us that not all ghosts are considered friendly and some actually create feelings of sadness and terror.