👉 Triceratops, also known as T-Rex, is a dinosaur that lived during the Late Cretaceous period about 68 million years ago. It was the largest and most powerful dinosaur of its time, towering over 25 meters (79 feet) in height and weighing up to 10 tons. Triceratops' massive size allowed it to easily reach trees and other vegetation, making it a formidable predator.