{
  "id": 18377834,
  "title": "Goodbye, eggshell: How pregnancy emerged in the animal world",
  "url": "https://urgent.news/2026/11/05/goodbye-eggshell-how-pregnancy-emerged-in-the-animal-world",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-05T00:00:05.000Z",
  "source": {
    "name": "Knowable Magazine",
    "slug": "knowable-magazine",
    "url": "https://knowablemagazine.org/content/article/living-world/2026/why-did-pregnancy-evolve-in-animals"
  },
  "original_language": "en",
  "account": null,
  "summary": "Mammals evolved live birth just once; lizards and snakes did it over and over. What set the stage for this drastic change and how was it orchestrated?",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}