The multiverse is a hypothetical group of multiple universes. Together, they compromise everything that exists: the entirety of space, time, matter, energy, information, and the physical laws and constant that describe them.
Hugh Everett came up with the first theory of the multiverse. One evening in 1954, in a student hall at Princeton University, the grad student Everett drank sherry with his friends when he came up with the idea that quantum effects cause the universe to constantly split.
Nowadays, there are many theories that suggest a multiverse. One of the latest is the theory by Professor Stephen Hawking. Celebrating his 75th birthday at the University of Cambridge, Hawking and Hertog presented the new theory of the multiverse.
Their idea hinges on the so-called holographic principle. The theory also points a way forward for astronomers to find evidence of the existence of parallel universes.
