🦴 Dinosaurs in Real Life | Triceratops & Stegosaurus (North America) What you’re seeing:
A Triceratops scene first (Late Cretaceous, muddy floodplain conditions), followed by a Stegosaurus scene (Late Jurassic, drier riverbed terrain). The goal is a realistic, ground-level sense of size, weight, and environment. When is this? 
Triceratops: about 68–66 million years ago(Late Cretaceous). 
Stegosaurus: about 155–150 million years ago(Late Jurassic). Where is this? 
Triceratops: end-Cretaceous rock units like the Hell Creek region of western North America (parts of modern Montana, North Dakota, South Dakota, Wyoming). 
Stegosaurus: the Morrison Formation of the western United States. How big were they?
Triceratops: roughly 26–30 ft (8–9 m) long.
Stegosaurus: typically around 21 ft (6.5 m)long, with some individuals approaching 30 ft (9 m). How we know:
These reconstructions are based on fossil skeletons found in well-studied rock formations (Morrison for Stegosaurus, Hell Creek regio...