Empty black holes may be the information storage units of the universe
One of the strange things about black holes is that, if you were to cross the event horizon, you could never return to tell anybody what was inside. The reason is not so much because of the strength of the gravitational pull, which may not be that strong for a very large black hole. Rather, it is because of how the curvature of spacetime affects your motion through it.
Once you cross a black hole event horizon, your light cone, the bubble of spacetime around you that you can affect in your immediate future, is bent to exist entirely inside the event horizon. Therefore, you can no longer have any impact on anything outside the black hole.
Eventually, you will be pulled into the singularity where the tidal forces approach infinity, and you will be spaghettified, your very atoms being stretched out and broken apart.
But is this story true?
The classical theory of gravity tells us that there is nothing to stop us from crossing an event horizon and that, because of this, all matter ends up at the center of the black hole, squeezed into zero volume.
But that is the standard theory, which doesn’t take quantum mechanics into account and may not be accurate.
