The Multiverse Theory suggests that our universe is just one of many, forming a vast network of parallel universes.

Cosmology, the study of the universe as a whole, is the primary scientific field that investigates the Multiverse Theory.

The Inflationary Universe theory proposes that the early universe underwent a period of rapid expansion, potentially leading to the creation of multiple universes.

String Theory aims to unify all fundamental forces of nature into a single theoretical framework, and it also suggests the existence of extra dimensions, potentially related to the Multiverse Theory.

Hugh Everett III is widely recognized for proposing the 'Many-Worlds Interpretation' of quantum mechanics, which suggests the existence of multiple universes.

The Many-Worlds Interpretation suggests that every possible outcome of a quantum event occurs in a separate universe, leading to the existence of multiple universes.

The Cosmological Principle suggests that the universe is homogeneous and isotropic on a large scale, which has implications for the structure and distribution of universes in the Multiverse Theory.

The Quantum Fluctuation theory suggests that universes can be created from quantum fluctuations during the early stages of the universe's existence.

Cyclic Cosmology suggests that the universe undergoes a cycle of expansion, contraction, and rebirth, potentially leading to the creation of multiple universes.

Eternal Inflation theory suggests that the universe continues to expand forever, potentially leading to the creation of an infinite number of universes.

Brane Cosmology suggests that our universe is a brane, or a membrane, floating in a higher-dimensional space, and that there may be other branes and universes coexisting.

Quantum Gravity aims to unify quantum mechanics and general relativity into a single theoretical framework, which could potentially provide insights into the nature of the Multiverse.

The Anthropic Principle suggests that the universe is fine-tuned for the existence of life, potentially providing insights into the nature of the Multiverse.

The Simulation Hypothesis suggests that our universe is a simulated reality created by an advanced civilization, potentially providing insights into the nature of the Multiverse.

The Parallel Universes theory suggests that there are multiple universes, each with its own unique set of physical laws and constants, potentially providing insights into the nature of the Multiverse.