No asteroids needed: ancient mass extinction tied to ozone loss, warming climate Science MagazineStudy shows erosion of ozone layer responsible for mass extinction event Phys.orgMass Extinction Event Caused by Erosion of the Ozone Layer SciTechDailyOzone depletion triggered mass extinction during the Age of Fishes New AtlasMass extinction 360m years ago caused by ozone layer erosion Daily MailView Full Coverage on Google News