The Earth's History before the Cretaceous-Paleogene Extinction Event!

About 66 million years ago, many of the Earth's species went extinct, including all species of dinosaurs. The catalyst for this mass-extinction is still a mystery, but many scientists believe that an astroid collision was its primary cause.

To learn more about the history of the Earth before the Cretaceous-Paleogene extinction, click the button below.

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