The massive lump of bone on the nose of Pachyrhinosaurus gives the impression that it was a horned dinosaur with no significant horn.

The bony mass may have been used as a battering ram when sparring, or as the base of a massive horn built of keratin that has not fossilzed.

Dino Facts

  • Pronounced: pack-ee-RINE-oh-SAWR-us
  • Means: Thick-nosed lizard
  • Size: 23 ft (7 m)
  • Where: North America (Alberta, Alaska)
  • When: Late Cretaceous
  • Diet: Herbivorous