It is likely that the Pentaceratops' huge frill was used as a headdress to impress other species.
Measuring 7.5 meters in its length and standing 2.5 meters tall, the Pentaceratops was one of the largest ceratopsid dinosaurs.
Unlike the more famous Triceratops, the Pentaceratops had a five-horned skull. All ceratopsids had a powerful frill, which was probably little used to defend themselves.
In all likelihood, the Pentaceratops had the largest known skull of all land-living animals. Quite a thick skull.
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