It's believed that space time emerged out of the singularity that spawned our universe but there is something that's assumed which may not be correct. It follows that space time inflated and then slowed down to it's current rate but it assumes that space time decoupled separating itself from matter as if oil on water. It's also assumed and without any scientific proof that space is expanding from itself as though it's a rolled up carpet.
Now I shouldn't be the only person to suggest that space time isn't some type of fabric or rubber mat that droops from mass ( planets don't have weight in space, a bowling ball on a rubber mat suspended over the earth does because of earth gravity but earth isn't hanging above a bigger mass).
Perhaps space time is more like a type of emitted radiation composed of the smallest wave/particles which is created somehow or exists still in all matter and emitted like light from a star. In other words matter maybe where space time still comes from even now.
