So, the Big Bang was the cold explosion of a String knot black hole Singularity, compacted by the reducing vacuum pressure into single Tadpole Black Holes making stars and splitted single black holes , (in the wake).
Tadpoles are looking for an equal sized partner by travelling to form a dual Herbig Haro system forming stars and spiral Galaxies. Merging galaxies form elliptical galaxies and sometimes stop starforming by the absence of dual BH Herbig Haro systems.