"Current theories of the early universe suggest instead that space itself expanded, everywhere in the universe at once, and that it is still expanding, pushing those clumps of matter that we call galaxies further and further apart."

Richard Muller wrote a recent book about a similar view that the universe is also constantly creating new TIME, which is why time seems to progress in only one direction, or as he puts it, to flow.
https://www.npr.org/sections/13.7/2016/09/27/495608371/now-and-the-physics-of-time