There Is No Singularity in Black Holes ✎ express
Space is like a sheet of paper: gravity bends it, making lines converge toward the center. But if you bend too hard, the paper tears, just as space, under monstrous curvature, doesn't collapse into a point but forms a torn edge. That edge is the quantum boundary. It arises because at ultra-small distances, where the ideas of Feynman about multiple paths and Planck about energy quanta merge, the very fabric of reality stops being smooth. A black hole squeezes matter, but quantum constraints prevent it from vanishing into an infinitely small point. For a hole with the mass of the Sun, this barrier sits at a radius of about 10⁻²² meters — not zero, but a finite size.
Thus, extreme spacetime curvature ends not in a singularity, but in the quiet demise of familiar geometry. No new dimensions, just known physics, taken to its logical conclusion.
For a black hole with the mass of the Sun, the quantum boundary radius is about 10⁻²² m, which is ten times larger than the Planck length, the smallest meaningful size.
The concept of a quantum boundary instead of a point of infinite compression echoes the movie 'Interstellar,' where inside a black hole something more than a singularity is found.