> ## Content Index
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# We Thought All Black Holes Came From Stars. We May Have Been Wrong.
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/we-thought-all-black-holes-came-from-stars-we-may-have-been-wrong-42bdqr/
- Published: 2026-08-18T12:30:29.000Z
- Updated: 2026-08-18T13:01:30.000Z
- Description: LIGO may have found an impossible black hole, hinting at primordial relics from the Big Bang.
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 11, Episode 33, #ZZZ_Episode_211a8254-3d61-480c-a282-29f6ca499703, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

LIGO may have detected a black hole that shouldn't exist, potentially revealing the first evidence of primordial black holes formed in the earliest moments after the Big Bang. But the bigger story is how a decade of gravitational-wave astronomy has transformed from proving Einstein right into a mature science capable of uncovering entirely new physics.