The Multiverse Theory suggests that our universe is just one of many universes that exist simultaneously. These universes, often referred to as parallel universes or alternate realities, may have different physical laws, constants, and even different versions of ourselves. This concept arises from various scientific theories, including quantum mechanics and cosmic inflation. In the Multiverse, each universe could have unique properties, leading to diverse outcomes and possibilities. For example, in one universe, dinosaurs might still roam the Earth, while in another, humans may never have evolved. This idea challenges our understanding of reality and raises questions about the nature of existence itself.