Lost organisms in Cretaceous-Tertiary extinction?

The Cretaceous-Tertiary extinction was caused by a massive asteroid impact on the Yucatan Peninsula, killing off all non-avian dinosaurs and devastating life on land and sea. Birds and mammals thrived in the aftermath. The Cretaceous-Tertiary extinction event was the second largest mass extinction of all time, but substantially closer in magnitude to the third, the […]

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