Late Cretaceous, 68–66 million years agoReputable sourceWell documented
Triceratops and the Horned Dinosaurs
On the timeline · around Late Cretaceous, 68–66 million years ago · The Cretaceous
What happened
Triceratops appeared around 68 million years ago, in the final stretch of the age of dinosaurs. This massive plant-eater bore three facial horns and a large bony frill, and shared its world with Tyrannosaurus rex.
Why it matters
Its horns and frill — used for defence and display — make Triceratops an icon of the Late Cretaceous, and it was among the dinosaurs still thriving when the asteroid struck.
Sources
- Natural History Museum. Triceratops · Reputable source