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252 million years ago ancient frogs outsmarted Earth’s deadliest extinction: Study
The dinosaur extinction is widely known, but the end-Permian mass extinction was an even more devastating event in Earth’s ...
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The Permian extinction—when life nearly came to an end
About 250 million years ago, at the end of the Permian period, something killed some 90 percent of the planet's species. Less than 5 percent of the animal species in the seas survived. On land ...
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Ancient Frogs Survived Earth's Greatest Mass Extinction Event by Not Adapting
Learn why the temnospondyls' inability to evolve eventually did them in when mammals and dinosaurs appeared on the scene.
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Tulsa Zoo gives first look at new dinosaur exhibit
The Tulsa Zoo is showing off its new exhibit, which takes guests through an immersive area full of different dinosaurs and ...
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Cambrian Period
These toughened-up creatures represented a crucial innovation ... the world's oceans until they were wiped out in the Permian extinctions about 250 million years ago. Photograph by James L.