Health Great Dying: Tropical Forest Collapse Caused Permian Extinction? by Dr Natalie Singh - Health Editor February 22, 2026 by Dr Natalie Singh - Health Editor February 22, 2026 The Great Dying: Earth’s Most Severe Extinction Event Approximately 252 million years ago, Earth experienced its most catastrophic loss of life in history – a mass extinction event known as … 0 FacebookTwitterPinterestEmail