The Great Dying once wiped out 90% of life on Earth. A new theory may explain why
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About 252 million years ago, a natural disaster struck the planet, wiping out more than 90% of all life.
The mass extinction that ended the Permian is known as the Great Extinction and was the worst of the five global catastrophic events in Earth's history, even more devastating than the event caused by a giant asteroid that wiped out the dinosaurs.
The most plausible explanation offered so far is that carbon dioxide released by volcanic activity in an area known ...