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  "path": "/news2/space/newsid=69350.php",
  "publishedAt": "2026-05-07T14:53:13.000Z",
  "site": "https://www.nanowerk.com",
  "textContent": "Most massive black holes detected via spacetime ripples likely grew from repeated violent collisions in dense star clusters, not direct star collapse.",
  "title": "Biggest black holes built up in busy star clusters after series of violent merging events"
}