Centrosaurus dinosaur herd, illustration
Centrosaurus dinosaur herd, illustration. These dinosaurs lived 76-74 million years ago, during the Late Cretaceous, in what is now Alberta, Canada. Centrosaurus dinosaurs weighed up to 1,000 kilograms and reached 6 metres in length. Their skulls had several large horns, including a large bony frill covering the neck., by JOSE ANTONIO PE�AS/SCIENCE PHOTO LIBRARY
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