The idea that the Big Bang was the end of another universe is a speculative concept proposed in some cosmological theories. It suggests that the universe we currently inhabit originated from the collapse or destruction of a previous universe.
According to this hypothesis, the previous universe could have undergone a process called a "Big Crunch," where it contracted under the influence of gravity until it collapsed into a singularity. This singularity would then lead to the subsequent expansion and "rebirth" of a new universe in an event known as the Big Bang.
It's important to note that our understanding of the early moments of the universe, including the exact nature of the Big Bang, is still an active area of research in cosmology. While the Big Bang theory is widely accepted and supported by observational evidence, the precise details of what happened before or at the moment of the Big Bang are still subject to scientific investigation and theoretical speculation.
The notion of a cyclical universe or multiverse, where universes are continually created and destroyed, has been proposed in various cosmological models such as certain versions of the cyclic model or the ekpyrotic universe. However, it's crucial to recognize that these ideas are speculative and not yet confirmed by empirical evidence.
Our current knowledge and observations provide limited insights into the nature of events before the Big Bang or the existence of previous universes. Further research, observations, and advancements in theoretical physics may bring us closer to understanding the origin and nature of the universe on a deeper level.