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Sharks More Evolved than Previously Thought

Sharks may not be “living fossils,” as was once thought. Researchers say analysis of a 325-million-year-old shark skeleton could “profoundly affect our understanding of evolutionary history.” Using a fossil of the newly discovered Ozarcus mapesae specimen, scientists at the American Museum of Natural History in New York had a unique chance to study a fossilized skeleton preserved in 3D, according to the researchers. Since shark skeletons are made of cartilage, fossilized...

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