Eric Walker added Exploding stars may have caused mass extinction on Earth, study shows to Supernovae, Isotopes and Late Devonian extinction

Eric Walker added Late Devonian extinction - Wikipedia to Late Devonian 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 Late Devonian extinction, and added Late Devonian extinction to Extinction events