A great philosopher of science, Karl Popper, once said that a proposition is not scientific unless it can be falsified—that is, unless one can perform an experiment that proves it wrong. At any given moment in history, the scientific theories and ideas we endorse are those that have not been falsified. If we can never test the infinities of the small and the infinities of the large, perhaps these notions are not scientific after all. But they are certainly vibrant in the realm of the imagination. —
