The Permian mass extinction occurred about 248 million years ago. It was the greatest mass extinction ever recorded in Earth's history. About ninety-five percent of all marine species became extinct as a result of the Permian extinction. Although scientific theories vary, it is believed that caused the Permian mass extinction. A)global warming)an asteroid hitting Earth)the introduction of dinosaurs)the start of glaciation and climatic changes
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The Permian mass extinction occurred about 248 million years ago. It was the greatest mass extinctio...
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