Maybe the whole universe he lived in no longer existed.

She would be able to see for herself that the outside universe still actually existed.

If there is a God, then the universe must exist to complete her in some way or other.

At a certain point on that line the physical universe exists.

"The other universe will still exist and move forward without your crew members."

Sam must learn why the second universe exists, and choose which one to live in.

Science offers no explanation whatever as to why the universe exists.

I mean, what's the point of saying an alternate universe exists if you can't get to it?

That is the way the universe exists, if we can only perceive it.

The universe existed and would continue to exist forever in more or less the same state as it is today.