> ## Content Index
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# The NEW Ultimate Energy Limit of the Universe
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/the-new-ultimate-energy-limit-of-the-universe-hwg48z/
- Published: 2025-01-29T18:30:51.000Z
- Updated: 2025-08-21T13:47:19.000Z
- Description: Is there a limit to how much energy you can cram into, or pull out of one patch of space?
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 10, Episode 28, #ZZZ_Episode_59027c66-c96a-42bf-b897-0ce32bb6cde4, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

The James Webb Space Telescope has found a quasar that simultaneously breaks a century-old theoretical limit and may explain the conundrum of gigantic black holes in the early universe.