# The Universe Has a Forbidden Zone for Black Holes. LIGO Just Mapped It.

- slug: the-universe-has-a-forbidden-zone-for-black-holes-ligo-just-mapped-it
- date: 2026-04-22
- category: Space & Aerospace

Mendeleev left gaps in his periodic table and the universe filled them. LIGO has found a forbidden zone in black hole masses — where pair-instability supernovae prevent black hole formation — and the gap is real, not a detector artifact.

---