How Did the Universe Originate?
The definitive view now of how the Universe has been born is the Big Bang theory. The Universe appeared 13.7 billion years from a quantum singularity, that is from an event related to the world of elementary particles. From there, in a swift period of time, all the known Universe and particles were created, expanding in all directions. The present Universe is the Universe 13.7 billion years after this primordial event.