Permian-Triassic extinction

The Permian-Triassic extinction, about 252 million years ago, was the Earth's largest mass extinction, wiping out around 90% of marine species and 70% of terrestrial vertebrates. It was likely caused by a combination of factors, including massive volcanic eruptions in Siberia, releasing enormous greenhouse gases, leading to severe global warming, Ocean anoxia, and acidification. These environmental changes drastically disrupted ecosystems and food chains. The event marked the end of the Permian Period and paved the way for the rise of new species in the subsequent Triassic Period.