On http://withrealtoads.blogspot.com/2019/03/physics-with-bjorn-cosmology-and.html the physicist Bjorn Brudberg asks us to consider the Big Bang theory and the concept of the expanding universe:-
Once I asked Google – “What was before the Big Bang?”
I received a number of answers. The one that intrigued me the most was the idea that the Big Bang emerged from a singularity. This singularity was the last remaining trace of a previous universe. This previous universe had gone through a period of expansion after its creation from its own Big Bang. After eons of time the energy released during that Big Bang dissipated and the universe that preceded ours began to implode back in upon itself. Eventually all that remained was the singularity that eventually exploded in the Big Bang which released the energy which birthed our universe. In time this energy will expend itself and our universe will implode. It too will become a singularity that will, at some point, explode in another Big Bang. A new universe will then come being.
While I may not have grasped the finer points of this concept I was struck by the similarity between it and a Hindu creation story that is recounted in the Upanishads, an ancient text compiled around 800-200 b.c. Once again I may not have grasped the finer points of the story but as I understand it goes like this:-
When the god Brahma breathes out, all life comes into being. When Brahma breathes in all life ceases to be. When Brahma breathes out again life comes into being once more. All existence is Brahma breathing in and out, in and out, in vast cycles of time and no time.
Are Brahma and the singularity one and the same? Perhaps it is that our universe is part of a an endless cycle of birth, death and rebirth.