Source: wikibot/cretaceous-paleogene-extinction-event
= Cretaceous–Paleogene extinction event
{wiki=Cretaceous–Paleogene_extinction_event}
The Cretaceous–Paleogene (K-Pg) extinction event, which occurred approximately 66 million years ago, marks one of the most significant mass extinctions in Earth's history. This event is best known for the sudden disappearance of about 75% of Earth's species, including the non-avian dinosaurs.