Particles cannot enter a black hole.

The event horizon is a light like surface to which massive particles cannot be coordinated.

Furthermore, the event horizon cannot be a single surface as represented in simplistic diagrams, but must be a surface which incorporates the electromagnetic spectrum going from low to high energy wavelengths.

Thus for all the wavelengths represented in the horizon massive particles are to be excluded meaning that there is no path into the black holes' interior.

The interior is negatively curved spacetime with a singularity perimeter of radius r[schwarzschild] and a singularity origin. This corresponds to a hyperdimensional pseudosphere. This means that the interior is a white hole.

Mass surrounding a black hole will itself gravitate and produce black holes. Thus, emerging from within the mass black holes pop into and out of existence as they compete for that mass. This means the black hole is composed of a phase of matter which interacts with spacetime known as Asymptotic Darkness.

A single white hole within Asymptotic Darkness can stabilize itself with another white hole at a distance. The white holes can form an Einstein Rosen bridge. We see this occurring between supermassive black hole centers of galaxies in clusters.

The evidence for this occurring is that distant black hole centers align spin with one another. I also propose that the entanglement of supermassive black holes forming galactic clusters curves the space of the local universe. Thus the dark matter phenomenon is a result of higher dimensional curvature which is caused by supermassive black hole wormhole entanglement.

This theory also provides a model for the big bang. If we compress all mass and energy into it's smallest dimension we will get Asymptotic Darkness, not a singularity. Prior to Dark energy forming the universe was an epoch of asymptotic darkness. Most of the black holes in our universe now are leftovers from that epoch.