The Multiverse is the hypothetical set of multiple possible universes (including the historical universe we consistently experience) that together comprise everything that exists: the entirety of space, time, matter, and energy as well as the physical laws and constants that describe them. It is often a major topic in Science Fiction and occasionally in Fantasy.
- The Hitchhiker's Guide to the Galaxy has, in what we laughingly call the past , had a great deal to say on the subject of parallel universes. Very little of this is, however, at all comprehensible to anyone below the level of Advanced God, and since it is now well established that all known gods came into existence a good three-millionths of a second after the Universe began rather than, as they usually claimed, the previous week, they already have a great deal of explaining to do as it is and are therefore not available for comment on matters of deep physics at this time.
- A tiny sun and moon spin around them, on a complicated orbit to induce seasons, so probably nowhere else in the multiverse is it sometimes necessary for an elephant to cock a leg to allow the sun to go past. Exactly why this should be may never be known. Possibly the Creator of the universe got bored with all the usual business of axial inclination, albedos and rotational velocities, and decided to have a bit of fun for once.
- The days followed one another patiently. Right back at the beginning of the multiverse they had tried all passing at the same time, and it hadn't worked.
- What if you could travel to parallel worlds? The same year, the same earth, only different dimensions. A world where the Russians ruled America, or where your dreams of being a superstar came true, or where San Francisco was a maximum security prison. My friends and I found the gateway. Now the problem is finding a way back home.