Multiverse theorists bring in the “anthropic principle” — that because we exist, we could not have observed a universe incompatible with life.

The study claims that a single photon could be present in two locations simultaneously. Some experts believe that if this assertion is true, then that means the multiverse does not exist. The team ...

The characters in Everything Everywhere All At Once are able to do something we probably won’t ever do, even if the multiverse does exist: reach across the boundaries between universes.