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  "publishedAt": "2026-04-15T09:52:07.000Z",
  "site": "https://upstract.com",
  "textContent": "Researchers studying a 250-million-year-old fossil have found the first ever proof that mammal ancestors laid eggs, with the discovery also shedding light on a remarkable survival story. The fossil, found in South Africa, belongs to a tightly curled embryo of a Lystrosaurus, a mammal ancestor…",
  "title": "This 250-million-year-old fossil proves mammal ancestors laid eggs"
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