Regarding this article: A black hole is in a geometrical sense an end to the universe. If we picture the universe using Euclidean geometry, we can imagine going straight out forever. As we approach a black hole, the huge mass changes the geometry so that we also go on forever reaching the surface. We cannot therefore speak about the “inside” of a black hole. The final state of an observer falling down is the singularity at the center of the black hole. A singularity is a division by zero. This means the solution is not valid.
Monroe Township, N.J.