The concept you're referring to is one of the speculative ideas within cosmology known as the "Big Bounce" or the "cyclic universe" hypothesis. According to this hypothesis, the Big Bang could have been the result of the collapse of a previous universe, leading to a subsequent expansion and the birth of our current universe. In this scenario, the universe undergoes cycles of contraction and expansion, with each cycle beginning with a Big Bang and ending with a Big Crunch.
While the Big Bounce hypothesis is an intriguing idea, it's important to note that it is still speculative and not currently supported by conclusive scientific evidence. The nature of events before the Big Bang, including whether there was a previous universe or what caused the Big Bang, remains an area of active research and debate in cosmology.
It's worth mentioning that the prevailing cosmological model, supported by a wide range of observational evidence, including the cosmic microwave background radiation and the expansion of the universe, is the Big Bang theory. According to this theory, the universe originated from a hot, dense state approximately 13.8 billion years ago and has been expanding ever since.
The idea of a cyclic or multiverse scenario, where universes are continually being created and destroyed, is still a subject of scientific investigation and theoretical exploration. Researchers are actively studying various cosmological models and considering different possibilities to better understand the origin and evolution of the universe.
In summary, while the idea of the Big Bang being the end of another universe is an intriguing concept, it currently remains speculative, and further scientific research is needed to provide more concrete evidence or support for such hypotheses.