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Oxygen spike coincided with ancient global extinction – Science Daily

Researchers have found that the extinction at the end of the Permian period coincided with a sudden spike and subsequent drop…

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Two hundred fifty-two million years ago, much of life on planet Earth was dying.In an event that marked the end of the Permian period, more than 96 percent of the planet’s marine species and 70 percent of its terrestrial life suddenly went extinct. It was…

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