What is the Marvel Universe?
The Marvel Universe is the fictional world in which the stories published by Marvel Comics are set. One of the things that first differentiated Marvel Comics is the fact that all of their stories take place in the same universe, which is very similar to ours. Superman lives in Metropolis while Spider-Man lives in New York City. All their heros share one world and what happens in one comic book could easily affect the plot line of any other. There are also alternate dimensions within the Marvel Universe. For example the Ultimate imprint that Marvel publishes takes place in a different dimension from the normal continuity. There are also numerous other dimensions created for the What If… series.
