GHOST. see the world has been created or formed by certain action such as colliding and fusion and some ways which are linked to the science. when the earth are in a perfect way for organisms to be evolved the life had begun.now when a human can understand the concept of death the myth of ghost can be solved at ease. like look at my point of view.
When the human give birth to a child , if the first heart beat is initiated by mom , then it continues till or then any forces that oppose the orgin of the life that is chain happenings of a human body. the human body is nothing but a mass of astounding figure of usefulness and complexity . hence that mass <human body> dies the function stops thus by stopping the condition for the orgin of life to go on. simply like an repaired machine.since the body is degradable the life can't be brought back.then like or so called soul is not an eternal object to found out it is just an identification for the ignition for the body to work.
