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The Tertiary Era.

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The Tertiary Era.

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A meteorite impacted Earth and caused the cretaceous-tertiary extinction.

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About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.

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A meteorite impacted Earth, causing devastation of the planet and mass extinction.

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A mass extinction or extinction event. For instance the death of the dinosaurs is the Cretaceous-Tertiary event (or K-T event for short).

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