The three-horned, plant-eating Triceratops lived during the Late Cretaceous period, about 68 to 66 million years ago, in what is now western North America. It, along with seventy-five percent of the plant and animal species on earth, was wiped out in the Cretaceous–Paleogene (K–Pg) extinction event. This model now resides on the living room wall at S & C’s place.