Triceratops is Greek for "three-horned face," but this dinosaur actually had only two genuine horns; the third, a much shorter "horn" on the end of its snout, was made from a soft protein called keratin, the kind found in human fingernails.
Late Cretaceous (65 million years ago)
Western North America
25 - 30 ft long, 9 - 10 ft tall
13,000 - 26,000 lbs
Triceratops were the largest and the last of all the horned dinosaurs. Its three enormous horns look frightening but they were not strong weapons, instead the horns were intended to attract possible mates.