Earth's current warming mirrors the path to its worst extinction event

A new study suggests Earth is on a path mirroring the Permian-Trias extinction, the most devastating in history. This mass extinction, 252 million years ago, wiped out 96% of marine species due to volcanic eruptions causing extreme warming and oxygen depletion. Survivors had higher metabolic rates and better oxygen uptake. Current ocean warming and deoxygenation echo this past event, raising concerns about a future mass extinction if significant action isn't taken.