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  "path": "/articles/d41586-026-00976-0",
  "publishedAt": "2026-03-25T21:33:13.972Z",
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  "textContent": "Nature, Published online: 25 March 2026; doi:10.1038/d41586-026-00976-0\n\nEvidence suggests oxygen levels may not have been limiting factor — plus, CRISPR gives cancer-fighting immune cells an upgrade.",
  "title": "Why insects aren't huge: a new challenge to a decades-old idea",
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