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Study suggests Earth’s first mass extinction may have been overlooked
A wave of new research is forcing paleontologists to reconsider a basic question about life on Earth: when did the first mass ...
Add Yahoo as a preferred source to see more of our stories on Google. After an ancient extinction killed about 85% of marine species, survivors in isolated refuges helped jawed vertebrates diversify ...
About 445 million years ago, Earth’s oceans turned into a danger zone. Glaciers spread across the supercontinent Gondwana, and shallow seas shrank fast. Ocean chemistry also shifted hard. In what ...
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