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  "path": "/releases/2026/04/260424233214.htm",
  "publishedAt": "2026-04-25T10:47:27.000Z",
  "site": "https://www.sciencedaily.com",
  "textContent": "A major physics experiment has uncovered evidence for a strange new form of matter, where a fleeting particle gets trapped inside a nucleus. This exotic state may reveal how mass is generated, suggesting that particles can weigh less when surrounded by dense nuclear matter. The findings support long-standing theories about how the vacuum of space influences mass.",
  "title": "This exotic particle could finally explain why matter has mass"
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