The Five Major Mass Extinctions: Earth's History of Biodiversity Loss

The video explores Earth's five major mass extinction events, detailing their causes and impacts. It begins with the Ordovician-Silurian extinction, attributed to global cooling, followed by the Late Devonian extinction linked to ocean anoxia. The Permian-Triassic extinction, the largest, was caused by volcanic activity. The Triassic-Jurassic extinction was due to global warming, and the Cretaceous-Paleogene extinction was triggered by an asteroid impact, leading to the demise of non-avian dinosaurs.

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