>>10209495The universe is "expanding" into itself. Spacetime, if you need to look at it as something besides a pure abstraction, includes all future configurations of the universe, or more precisely the future spatial dimensions of its matter and energy. We may perceive that the dimensions of the matter and energy around us are changing, but all matter and energy exists and will exist as defined spacetime configurations.
Put another way, as indicated by
>>10209500 >>10209852 -- there is no expansion of the dimensions of the universe, just a change in the configuration of the dimensions of its contents. The full topography of these dimensions, the "shape" of the universe, is already and was always complete.
