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| at the end of the Cretaceous, at the end of the Cretaceous Period (The K-T extinction happened at the end of the Cretaceous period and the beginning of the Tertiary period. ArcticFox) | |||
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| at the end of the Cretaceous, at the end of the Cretaceous Period (The K-T extinction happened at the end of the Cretaceous period and the beginning of the Tertiary period. ArcticFox) | |||