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  "path": "/news2/space/newsid=68985.php",
  "publishedAt": "2026-03-24T20:33:11.000Z",
  "site": "https://www.nanowerk.com",
  "textContent": "Astronomers have an answer for a long-running mystery in astrophysics: Why is there much less growth of supermassive black holes today than in the past?",
  "title": "Why black holes hit the brakes on growth"
}