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Arizona fossils reveal an ecosystem in flux early in the age of dinosaurs

Scientists have unearthed in Arizona fossils from an assemblage of animals, including North America’s oldest-known flying reptile, that reveal a time of transition when venerable lineages that were destined soon to vanish lived alongside newcomers early in the age of dinosaurs. The remains of the pterosaur, roughly the size of a small seagull, and the […]


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