Spacetime crystals could spawn miniature black holes

Goethe University and TU Wien physicists propose that if spacetime can crystallize into a regular four‑dimensional lattice, a tiny energy perturbation could trigger a critical collapse that births microscopic black holes. Their work provides simple, exact solutions to Einstein’s equations for this process and suggests a possible primordial-black-hole pathway, but it does not prove such holes exist and notes they would evaporate quickly via Hawking radiation.