The End-Cretaceous extinction, also known as the Cretaceous-Paleogene (K-Pg) extinction event, refers to the mass extinction that occurred around 66 million years ago, leading to the disappearance of approximately 75% of Earth's species, including the non-avian dinosaurs. This event marks a significant turning point in the evolutionary history of the animal kingdom, paving the way for the rise of mammals and eventually humans.
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