Which is the largest known mass extinction in Earth’s history?
Quick Answer
The Permian–Triassic extinction event was the largest known mass extinction. It occurred about 252 million years ago and wiped out most marine species and many land animals.
The Full Story
The Permian–Triassic extinction, also called the Great Dying, is the most severe extinction event known in Earth’s history. It happened about 252 million years ago and eliminated an estimated 90% or more of marine species, along with a huge fraction of land life. Scientists link it to major volcanic eruptions, climate warming, ocean acidification, and oxygen loss in the oceans. The event reset life on Earth and paved the way for the rise of dinosaurs in the following Mesozoic era.
Key Facts
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