MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Triceratops. Computer enhanced image of fossilised skulls of a Triceratops dinosaur. Triceratops ("three-horned face") was a herbivore that had skulls which were up to 2 metres long. The skull was this dinosaur's main defence against predators due to the three horns (2 over the eye sockets and one on the nose), and a bony frill that protected the neck. This powerful and heavily-built dinosaur was a formidable opponent for any predator. The frill had slots where large muscles for powering the creature's beak-like jaw were attached. Triceratops evolved only a few million years before dinosaurs became extinct at the end of the Cretaceous period (about 65 million years ago).
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