# Mass Extinctions in Earth History

Compare the five major mass extinction events in Earth history (End-Ordovician, Late Devonian, End-Permian, End-Triassic, K-Pg), describe proposed kill mechanisms for each (glaciation, oceanic anoxia, volcanic mega-eruptions, asteroid impact), and explain why mass extinctions, while catastrophic, also open ecological space for subsequent evolutionary radiations

Builds on: The K-Pg Extinction Event (hard, https://ai.page/c/the-k-pg-extinction-event/en.md), Extinction & Rapid Change (soft, https://ai.page/c/extinction-and-rapid-change/en.md)

Concept id: mass-extinctions-in-earth-history. Subject: science. Licence: CC BY-SA 4.0.

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