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Study shows Earth's first known mass extinction event 550 million years ago

A new study by Virginia Tech geobiologists traces the cause of the first known mass extinction of animals to decreased global oxygen availability, leading to the loss of a majority of animals present near the end of the Ediacaran Period some 550 million years ago. ....

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Geobiologists shine new light on Earth's first known mass extinction event 550 million years ago

Geobiologists shine new light on Earth's first known mass extinction event 550 million years ago
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