# The Gluon Field Did 99% of the Work

- slug: the-gluon-field-did-99-of-the-work
- date: 2026-04-25
- category: Space & Aerospace

Physicists found the first evidence for an eta-prime mesic nucleus after a 20-year hunt. The discovery confirms that nearly all a particle's mass comes from vacuum energy, not its quarks.

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