What Caused the End-Cretaceous Mass Extinction?

Our series on mass extinctions has explored Earth s five mass extinctions: the End-Ordovician, the Late Devonian, the End Permian, the End-Triassic, and the End-Cretaceous (K-Pg) extinction. We are at the last mass extinction event. What caused the End-Cretaceous mass extinction? The End-Cretaceous mass extinction was caused by a 6-9 mile (10-14 kilometer) asteroid striking Earth near Mexico s…