The Permian extinction is best described as which of the following?

• A. 10% of species extinct.
• B. 50% extinction.
• C. No extinction.
• D. 90% of all living things became extinct.

Answer: (D)

A mass extinction marks a time when a huge fraction of Earth's species disappear in a geologically short interval. The Permian extinction stands as the most severe event in the history of life, with about 90% of all species going extinct. This scale affected a broad range of life, especially marine organisms, and it radically reshaped ecosystems on land as well. The consensus is that such a dramatic loss occurred due to dramatic environmental upheaval—likely long-lasting volcanic activity, rapid climate change, oceanic anoxia, and disrupted habitats—followed by a long recovery period that took tens of millions of years. Because the event’s defining feature is this extreme level of biodiversity loss, describing it as around 90% extinction best captures its magnitude. Saying only 10% or 50% went extinct underestimates the devastation, and saying there was no extinction contradicts the evidence.