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Mating Injuries May Lead Scientists to Identify Dinosaurs’ Sex

Researchers analyzed 500 hadrosaur tailbones from three continents and found consistent mating-related injuries identifying females, a breakthrough in dinosaur sex determination.

Summary by KIFI
By Ashley Strickland, CNN (CNN) — Paleontologists have long wrestled with how to differentiate between male and female dinosaurs based on their fossils. But new research may bring scientists closer to identifying the sex of one group of dinosaur. Hadrosaurs, also known as duck-billed dinosaurs, were common during the Late Cretaceous Period (100.5 to 66 million years ago), and the bones of these herbivores have been found across multiple continen…

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RTÉ broke the news in Ireland on Tuesday, November 4, 2025.
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