{"ok":true,"article":{"slug":"lost-mega-escarpment-across-ancient-usa-may-explain-grand-canyon-s-missing-billi-1581ff0f","title":"Lost 'mega-escarpment' across ancient USA may explain Grand Canyon's missing billion years","url":"https://phys.org/news/2026-08-lost-mega-escarpment-ancient-usa.html","canonical":"https://www.aimode.news/article/lost-mega-escarpment-across-ancient-usa-may-explain-grand-canyon-s-missing-billi-1581ff0f","sourceName":"Phys.org","summary":"Scientists have found evidence that a colossal cliff stretching thousands of kilometers across ancient North America may have exposed the heart of the Grand Canyon nearly a billion years before it was carved by the Colorado River.","category":"Science","image":null,"lang":"en","publishedAt":"2026-08-18T23:10:05+00:00","createdAt":"2026-08-18T23:30:12.991205+00:00"}}