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Extinction is the rule. Survival is the exception.

Extinction is the rule. Survival is the exception. Carl Sagan

The dinosaurs' long tenure had ended, and the mammals had taken over.

The dinosaurs' long tenure had ended, and the mammals had taken over. Neil deGrasse Tyson

The history of life on Earth is written in extinction.

The history of life on Earth is written in extinction. Michael Shermer

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