The question "Why does the universe exist?" involves both philosophical and scientific inquiry with no single definitive answer. Philosophically, some propose that the universe exists because of an energy-based origin from multidimensional realms or as part of a logical necessity where all possible universes exist (e.g., some views in Advaita Vedanta or metaphysical realism). Others argue that the existence of the universe is tied to complex conditions that allow life and consciousness, potentially implying purposeful creation by a divine being or arising from fundamental laws of physics. Scientifically, researchers investigate the fundamental particles and laws (such as the asymmetric behavior of matter and antimatter) that allowed our universe to come into being, with projects aiming to explain why matter prevailed over antimatter, thus leading to the universe's existence as we perceive it. Quantum theories also suggest the universe could have spontaneously appeared from a quantum fluctuation in a void, without requiring a cause beyond physical laws. In summary, the existence of the universe is still an open question where philosophy offers varied metaphysical explanations and science explores the physical mechanisms behind its emergence. Both together enrich the understanding but do not yet provide a conclusive answer.