Today, in a pluralistic age, it seems we need a number of overlapping theories with factors in common to describe what we are beginning to call the multiverse. In an environment that includes black holes, super black holes, dark matter, dark energy , string theory, M-theory, alternate pasts and alternate futures, we can no longer assume there is one universe or even a set of universes, with a single group of natural laws applicable to everything from the domain of atoms to that of astronomy.
This does not mean all ideas are created equal or that every strand of the multiverse is radically different from its nearest neighbor. We can argue, however, that one set of scientific laws might be appropriate to one universe, or even galaxy, while not quite fitting another. Even laws we have taken for granted, like those relating to the speed of light, might be at odds in different realms of a near-infinite set of universes. The grand design which we have taken for granted since Newton is likely to be more complex than anything he ever dreamed of.
When the one you love becomes a memory, that memory becomes a treasure.