Someday, hopefully in my lifetime the right person will be able to explain the answer to your question better than I can. You would think in this day and age with so much intelligence and knowledge that there would be more people able to grasp the underlying nature of the Universe. The fabric of space is energy. Energy is everywhere with varying degrees of relative density. From the almost pure vacuum that is note quite pure to the center of the largest stars there is energy. Some manifested as matter, some as heat, some as light, some as motion, some as attraction, some as kinetic, and some as potential.
It is upon this fabric of energy that there exists the visual representations of measurable units. Measurable units of time, measurable units of distance, and measurable units of energy (be it heat, or light, or motion, or matter) all providing our eyes and brains with an ability to perceive the visual universe.
It is these measurable units and visual perceptions of the manifestations of energy that give us the reality we call life. But these measurable units are not finite, only our small tiny minds and their inability to think on a grander plane create the false impression of the finite. In reality these measurements are made up of an infinite number of smaller measurements each making up an infinite chain of smaller measurements all as part of an infinite chain of larger measurements.
What we call our space time continuum that we feel originated with a big bang is nothing but a point in the true fabric of space and time. It is a point because in the grand scheme of the true Universe our known universe is a massless, timeless, energyless speck of nothingness.
Relativistic physics however makes our known universe much more than a point in time and space because we can place visual measurements upon both the super large and super small. It is only our current limitations on the degree of scientific precision we are able to obtain with our current technical instruments that prevent us from really understanding the true fabric of space and time.