[Serious] Is the Past Real?

[LinuxGal]

Yes, I do agree that parsing out what constitutes the present subjectively from within the universe has value.  I am curious about time at the cosmic level. Does the universe, as a whole have multiple states? If space-time is entirely within the universe, then it would seem it could not have multiple states or change.

Everett's relative state formulation of quantum mechanics can't deal with Schrodinger's damn cat. Instead of one world where it's dead and one world where it's alive, there's only one world where it's alive until the experiment is carried out nine times.