Ordovician-Silurian extinction | Overview & Facts | Britannica

Why did the dinosaurs go extinct?

Mass extinction facts and information from National Geographic

The end Cretaceous asteroid impact released an extraordinary amount of energy, with scientific estimates on the order of tens of millions to about one hundred million megatons of TNT. The collision generated massive tsunamis and lofted vast quantities of dust and sulfur bearing material high into the atmosphere, while global wildfires added soot. Climate models show that this combination sharply reduced sunlight, shut down photosynthesis, and drove severe global cooling for months to years, coll

End-Cretaceous asteroid caused massive global tsunami, peaking at a mile high

End-Cretaceous asteroid impact seems to have juiced seafloor volcanoes

The 5 mass extinction events that shaped the history of Earth — and the 6th that's happening now