Life
The 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
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Fossils show plants were producing higher levels of sunscreen chemicals to protect against higher ultraviolet light levels at the end of the Permian period
An exceptionally well-preserved duck-billed hadrosaur found in North Dakota hints that dinosaur mummies may be more common than we think