LifeThe ozone layer was destroyed during Earth's biggest mass extinction Fossils show plants were producing higher levels of sunscreen chemicals to protect against higher ultraviolet light levels at the end of the Permian period News
LifeHow flowering plants beat bloom-free gymnosperms to world dominance Flowerless gymnosperms, such as conifer and ginkgo, ruled the Jurassic world before their flowering rivals, the angiosperms, became dominant. What caused the fall of one and the rise of the other? Features