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15 feet long
Late Cretaceous, 75 million years ago
Western North America

Kosmoceratops was only half the size of Triceratops, the largest horned dinosaur.But Kosmoceratops had the fanciest head decorations of any dinosaur. An adultKosmoceratops had 15 horns on its head. But it probably had few when it wasyoung as the horns would have been used to impress other adults.

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