Prehistoric Animal Museum

Meet today’s friendStegosaur dinosaur

Stegosaurus

Look at the two rows of plates along its back. Do they look like a line of little hills?

This is Stegosaurus, a plant-eating dinosaur from the Late Jurassic. Look at the two rows of plates along its back. Do they look like a line of little hills?

Still model of Stegosaurus on a transparent background

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Stegosaurus

Pachycephalosaurus

Ichthyosaurs

Tyrannosaurus rex

Rhamphorhynchus

Triceratops

Apatosaurus

Plesiosaurs

Gigantoraptor

Tupandactylus

Woolly mammoth

Dilophosaurus

Spinosaurus

Lystrosaurus

Archaeopteryx

Carnotaurus

Anomalocaris

Preparing the Stegosaurus exhibit.

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Guide for grown-ups

When it lived: Late Jurassic
Where fossils were found: western North America
Body length: 6.5–9 m (about 21–30 ft)
Diet: Plant-eater
What kind of animal?: Stegosaur dinosaur. Stegosaurus belonged to the stegosaurs, a branch of the ornithischian dinosaurs. The bony plates along its back and the spikes at the end of its tail are its easiest features to recognise.

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Narration transcript

This is Stegosaurus, a plant-eating dinosaur from the Late Jurassic. Look at the two rows of plates along its back. Do they look like a line of little hills?

Research notes about Stegosaurus

Research summary

Classification used here: Stegosaur dinosaur. Fossils assigned to Stegosaurus are known from Late Jurassic and have been found in western North America. The museum uses 6.5–9 m (about 21–30 ft) as the reference body length and describes the diet as plant-eater. Stegosaurus belonged to the stegosaurs, a branch of the ornithischian dinosaurs. The bony plates along its back and the spikes at the end of its tail are its easiest features to recognise.

Fossil evidence and reconstruction limits

The length is an approximate range suitable for family reading; estimates from different specimens are not presented as one exact measurement.
Plate colours and sounds are not described as scientifically confirmed facts.

Scientific sources

Stegosaurus - Natural History MuseumAccessed 2026-07-27
Stegosaurus stenops - Smithsonian National Museum of Natural HistoryAccessed 2026-07-27

Leon Made This compiled these research notes from public museum resources and scientific papers while preserving uncertainty in the reconstruction. Last reviewed 2026-08-07.

3D model and asset credits

PBR Stegasaurus (Animated): “PBR Stegasaurus (Animated)” by Ferocious Industries, CC BY 4.0; modified for the Prehistoric Animal Museum. Creative Commons Attribution 4.0 International

Open source and licensing

The code is licensed under AGPL-3.0. Original science writing and project artwork use CC BY-NC-SA 4.0 for non-commercial sharing. The brand policy prevents impersonation, and third-party assets keep their original licences.

View the GitHub project Read the full licensing notes

Official source

Made by Leon Made This

Prehistoric Animal Museum is made and maintained by Leon Made This. Use these addresses to verify the official project and its creator.

Official Prehistoric Animal Museumhttps://leon-made-this.work/museum/en/Leon's personal websitehttps://leon-made-this.work/

More information is available below.

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Leon Made This

About this museum

A little museum made by a developer dad for his daughter

I’m Leon, a developer and a dad. When my daughter was three, dinosaur chases on television frightened her, so I made a 3D prehistoric animal museum where she could look quietly and listen only when she wanted to.

The museum is free, with no sign-up, adverts or visitor tracking. Finding one interesting detail at a time is plenty.

Official source

Made by Leon Made This

Prehistoric Animal Museum is made and maintained by Leon Made This. Use these addresses to verify the official project and its creator.

Official Prehistoric Animal Museumhttps://leon-made-this.work/museum/en/Leon's personal websitehttps://leon-made-this.work/

View the source on GitHub Read the licence and asset notes