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  "path": "/article/how-the-grand-canyon-formed-is-a-surprisingly-messy-story-heres-the-latest-clue/",
  "publishedAt": "2026-04-16T18:00:00.000Z",
  "site": "https://www.scientificamerican.com",
  "textContent": "A new study suggests a proto–Colorado River filled a large basin before spilling westward to set the Grand Canyon’s modern path",
  "title": "How the Grand Canyon formed is a surprisingly messy story. Here's the latest clue"
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