Alexander Kamenshchik

A star that has exhausted its fuel falls into itself. Its outer layers fly apart, while the core compresses to unimaginable densities. It was once thought that this process ends in a point — a singularity where the laws of physics break down. New work shows that just before the very end, something strange happens inside the future black hole.

The quantum world does not like being pinned down to exact numbers. Physicists usually expand a complex interaction into a long series, like a sum of ever-smaller corrections.