Great Dying

Definition

Also known as the "Permian–Triassic (P–Tr) extinction event", it refers to an extreme biodiversity crisis about 252 million years ago when up to 96% of all marine species and more than two-thirds of terrestrial species died out.

Related terms

Biodiversity Crisis: A fast-paced decline in biological diversity on earth often linked with human activities or natural disasters such as volcanic eruptions or asteroid impacts.

Paleozoic Era: The era of geologic time from about 540 to 250 million years ago. The Permian-Triassic extinction event marked the end of this era.

Recovery Fauna: The surviving species that repopulate an ecosystem after a mass extinction event.