There is nothing in science more awesome, more majestic. To discern the nature of ultimate reality, one must begin with the challenge of multiple universes. So what is a "multiverse"?

Multiple universes are predictions of the math behind existing theories, and the level one multiverse idea is predicted by a very well-respected and central concept in physics: inflation.

The MCU's Infinity Saga didn't dive too much into the multiverse. Movies such as Ant-Man showed some of the Quantum Realm, while Doctor Strange only mentioned the multiverse.

The idea of multiple universes, or a multiverse, is suggested by not just one, but numerous physics theories. Here are the top five ways additional universes could come about.

Still, by the time "Spider-Man: Across the Spider-Verse" debuted in 2023, the concept of multiple universes that collide with one another was well-established.

In the multiverse, a few universes should, statistically speaking, be life-friendly.

Some scientists say we live in a multiverse, and that the universe we inhabit is just one of many — or perhaps an infinite number — in existence.

Doctor Strange 2 treads new ground for the MCU by folding multiverse-based horror into the cape-and-cowl magic.