Harrison Duran, a fifth-year biology student at the University of California, Merced, unearthed the 65 million-year-old skull in North Dakota during a dig last month.
The fossil was found upside down with the base of its left horn partially exposed.
The dinosaur has been named "Alice" after the landowner.
Duran said his interest in dinosaurs dates back to his early childhood. He now hopes to use the fossil as an education tool for others.
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