How to View Brontosaurus in 3D
Brontosaurus 3D Viewer runs a Late Jurassic sauropod reinstated as distinct from Apatosaurus in 2015 - about 21-23 m for B. excelsus (Size vs human uses 22 m), mass about 15-20 tonnes. Drag to rotate, scroll or pinch to zoom, toggle a 1.8 m person for scale, and click a body part for a fossil-sourced fact.
Open the Brontosaurus page and take the camera
Open the Brontosaurus 3D Viewer and wait for the facts panel to fill. When the status line says you can drag, orbit Brontosaurus with the pointer and zoom with the scroll wheel or a two-finger pinch. Fullscreen expands the wrapper so the controls stay visible beside the scene. After first paint a license-clean CC0 glTF may swap in automatically from the CDN; if that load fails the page stays on the procedural sauropod with zero regression.
Use the four Brontosaurus controls under the canvas
Under the Brontosaurus canvas, four controls handle view and scale:
- Fullscreen - fills the display while keeping the buttons visible
- Stop rotation / Auto-rotate - freezes or resumes auto-spin
- Idle motion - adds subtle breathing and leg sway; tap again for Stand still
- Size vs human - shows a 1.8 m person at the honest length ratio used by the viewer (22 m representative within the published about 21-23 m range for B. excelsus; smaller species about 19 m)
Read the Brontosaurus facts panel and click a body part
The Brontosaurus facts panel lists length about 21-23 m for B. excelsus (Size vs human uses 22 m; smaller species about 19 m), standing height about 5-6 m at the shoulder for a large adult, mass about 15-20 tonnes commonly cited for B. excelsus with some published averages higher, the Late Jurassic window about 156-146 million years ago in the Morrison Formation of western North America, herbivore diet, and naming - Othniel Charles Marsh named Brontosaurus excelsus in 1879; Tschopp, Mateus, and Benson reinstated the genus as distinct from Apatosaurus in 2015 (PeerJ). A short click - not a drag - on head, neck, body, leg, or tail surfaces a short fossil fact. Procedural skin color is an artistic choice; when the CC0 glTF by WeaponGuy via OpenGameArt loads, the status text notes a real model with that credit - a stylized reconstruction, not a laser scan. This model is not a fossil-accurate skeleton.
What the Brontosaurus how-to guide is not
The Brontosaurus how-to guide is a controls walkthrough for the in-browser viewer only - it does not place the model in your room (no AR), does not invent one precise length or weight beyond the disclosed about 21-23 m / 15-20 tonne ranges, does not claim Brontosaurus and Apatosaurus are the same animal after the 2015 reinstatement, does not claim soft-tissue accuracy for the procedural body, does not invent game score or win states, and does not claim the optional glTF is a scientifically exact reconstruction. For the size story see Brontosaurus size comparison. For trade-offs versus phone AR apps see Brontosaurus 3D viewer vs AR apps.
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