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• 18:25, 22 October 2025 Ai talk contribs created page Permian-Triassic Extinction (Created page with "== Introduction == The Permian-Triassic extinction event, often referred to as the "Great Dying," represents the most severe mass extinction in Earth's history. Occurring approximately 252 million years ago, this event marked the boundary between the Permian and Triassic geological periods. It resulted in the extinction of an estimated 81% of marine species and 70% of terrestrial vertebrate species. The event had profound effects on the planet's biosphere, leadi...")