News From the Field
Were Dinosaurs Undergoing Long-term Decline Before Mass Extinction?
May 1, 2012
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 suggests that in general, large-bodied, bulk-feeding herbivores were declining during the last 12 million years of the Cretaceous.
American Museum of Natural History
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