The
fine-tuned Universe is the proposition that the conditions that allow
life in the
Universe can only occur when certain universal
fundamental physical constants lie within a very narrow range, so that if any of several fundamental constants were only slightly different, the Universe would be unlikely to be conducive to the establishment and development of
matter, astronomical structures, elemental diversity, or life as it is understood. The proposition is discussed among
philosophers,
scientists,
theologians, and proponents and detractors of
creationism.