Ordovician-Silurian extinction events
During the Ordovician-Silurian Extinction, which occurred approximately 439 million years ago, 85% of species on Earth became extinct.The ocean levels dropped, and the sea life died.
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Ordovician-Silurian extinction eventsDuring the Ordovician-Silurian Extinction, which occurred approximately 439 million years ago, 85% of species on Earth became extinct.The ocean levels dropped, and the sea life died.
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