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  "path": "/news2/robotics/newsid=68948.php",
  "publishedAt": "2026-03-19T23:17:32.000Z",
  "site": "https://www.nanowerk.com",
  "textContent": "Scientists have developed a self-training method that strengthens lab-grown muscle tissues around the clock, and used them to power a living-muscle robot that swims faster than any of its predecessors.",
  "title": "Lab-grown muscles bulk up on their own to power a swimming robot"
}