Black hole singularity is a surface not a point
Points and comments are a snapshot, not live.
Black hole singularities are surfaces, not points, challenging common portrayals.
The paper argues that in general relativity, the singularity at the center of a spherical black hole is a surface, not a point. Two free-falling observers on different angular paths lose causal contact before reaching it. For rotating black holes, the singular surface likely resides at the inner horizon, where perturbations trigger mass inflation and collapse to a spacelike singular surface. The authors suggest quantum gravity states may reside on this effectively 2-dimensional surface, coevolving unitarily with trapped Hawking radiation.
What commenters are saying
Commenters largely agree this is standard GR, not new research, criticizing popular science misrepresentations. One camp notes the singularity is a spacelike surface (a future moment), not a point in space. Another corrects the misleading "space and time switch places" trope, explaining it is a coordinate artifact-space becomes timelike, meaning all paths inevitably lead to the singularity. A reference to Penrose's 1972 Scientific American article is recommended for a clear visual explanation using Eddington-Finkelstein coordinates.