What existed before the Universe

The question of what existed before the universe is a topic of philosophical and scientific speculation, and our current scientific understanding might not be able to provide a definitive answer to this question. The concept of "before" might not even apply in the same way to the universe's origin, as time itself is thought to have begun with the Big Bang. 

According to the prevailing cosmological model, the universe began as a singularity—a point of infinite density and temperature. The laws of physics, as we currently understand them, break down at this point. This makes it difficult to describe what happened "before" the Big Bang in conventional terms, as time and space as we know them may not have existed prior to the Big Bang.

Some theories in cosmology, such as certain versions of the multiverse hypothesis, suggest that our universe is just one of many universes in a broader multiverse. In this view, the concept of "before" the universe's existence might not apply in the same way, as there could be a higher-dimensional framework in which universes are born and evolve independently.

Some speculative theories propose cyclic models of the universe, where the universe goes through cycles of expansion and contraction. These models suggest that the current universe could be one iteration of this cyclic process, with previous universes having existed before.

It's possible that our current understanding of physics and cosmology is incomplete, and future advancements in these fields could shed light on the nature of the universe's origin and any possible existence before it. The question of what existed before the universe is still an open and complex topic that requires further investigation and exploration by physicists, cosmologists, and philosophers.