The original post: /r/todayilearned by /u/dustofoblivion123 on 2024-12-01 07:21:39.

Original Title: TIL about the black hole information paradox, a conflict in physics between quantum mechanics and general relativity. The latter says that matter which falls into a black hole is lost when the black hole evaporates, but this violates the principle of information conservation in quantum mechanics.