What is alternate universe?

An alternate universe is a concept that describes a fictional world that is different from the one we know. It is a hypothetical world or dimension that exists parallel to our own, with its own unique set of rules, events, and characters. These universes can be created by changing key events in history, exploring "what-if" scenarios, or introducing new elements like magic or advanced technology.

Alternate universes are often used in literature, film, and television as a way to explore unique storylines or to portray different versions of existing characters. They can also be used to examine societal issues in a fresh and creative way. Examples of alternate universes include the Marvel Universe, the Star Wars universe, the world of Harry Potter, and many others. The concept of alternate universes has also found its way into popular culture with the rise of sci-fi and fantasy genres.