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Were Dinosaurs Undergoing Long-term Decline Before Mass Extinction?

Dinosaur Disparity Press Image

Despite years of intensive research about the extinction of non-avian dinosaurs about 65.5 million years ago, a fundamental question remains: were dinosaurs already undergoing a long-term decline before an asteroid hit at the end of the Cretaceous? A study led by scientists at the American Museum of Natural History gives a multifaceted answer.

American Museum of Natural History

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