There are well documented cases of human beings mysteriously vanishing or dissapearing into thin air. There are instances of those who have entered into another world by transforming their physical body into light. Spiritually and energetically they enter into another higher plane of reality.
Most of the World's Great Religions teach that the human body can be transformed into a Higher State of Being. The Human being is designed to evolve. A human being has a physical body, and a spiritual body which is referred to by various names in the many religious and ancient spiritual traditions.