Eric Walker added Sea life bounced back fast after the ‘mother of mass extinctions’ to Permian-Triassic mass extinction

Eric Walker added Darkness caused by dino-killing asteroid snuffed out life on Earth in 9 months | Space to Permian-Triassic mass extinction

Eric Walker added A brief history of dinosaurs | Live Science to Permian-Triassic mass extinction

Eric Walker added A Warning Sign of a Mass Extinction Event Is on the Rise, Scientists Say to Permian-Triassic mass extinction and Extinction events

Eric Walker added After Earth’s Worst Mass Extinction, Life Rebounded Rapidly, Fossils Suggest - The New York Times to Permian-Triassic mass extinction

Eric Walker added Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction - The New York Times to a number of topics

Eric Walker added Biggest mass extinction ’caused by volcanic eruption in Siberia’ – NewsyPeople to Permian-Triassic mass extinction and Siberia

Eric Walker added Permian–Triassic extinction event - Wikipedia to Permian-Triassic mass extinction

Eric Walker added Study shows erosion of ozone layer responsible for mass extinction event | EurekAlert! Science News to Climate change and temperature, Permian-Triassic mass extinction and Late Devonian extinction

Eric Walker added a number of topics and a number of links to Extinction events, and added Extinction events to Paleontology

Eric Walker added a number of links to Permian-Triassic mass extinction, and added Permian-Triassic mass extinction to Permian, Triassic and Extinction events

Eric Walker added End-Triassic extinction and Permian-Triassic mass extinction and Triassic - Wikipedia to Triassic, and added Triassic to Mesozoic

Eric Walker added Permian-Triassic mass extinction and Permian Period to Permian, and added Permian to Paleozoic era