Repeatedly, super­natural explanations for physical events (such as comets, eclipses, earth­quakes, lightning, plagues, design in nature, Cambrian fossil explosion) later turned out to be scientifically explain­able. Even questions surrounding the origin of our universe, its apparent fine-tuning and the origin of life are yielding to scientific investigation. As scientific know­ledge continued to advance over the past 400 years, supernatural explanations for events con­tinued to retreat and retreat. Many scientists faced with such a consistent trend have extrapo­lated to the conclusion that all of our earthly gods are non-existent and our holy books merely human creations.