

Here’s another fun fact then, any “cosmic boundary” would be surrounded on all sides by the universe, and would simultaneously exist at it’s center. Because every point in the entire observable universe is the center of the universe.
Which again sounds an awful lot like a black hole.
So maybe there is a boundary. It’s all black holes all the way down. interconnected universes all pointing to each other through black holes and Einstein-Rosen bridges all feeding off of and in to one another. The dark energy accelerating space time’s expansion coming from beyond our local event horizon in a brief moment of feeding.
How do you know that isn’t already happening?