Cretaceous
Tyrannosaurus
Tyrant lizard
- Length
- 12.3 m · 40 ft
- Lived
- 68–66 Ma
- Diet
- Carnivore
- Found
- Hell Creek Formation, Montana
Mesozoic theater · 252–66 million years ago
Dinosaurs
Pick an era, wake an animal, and stand it next to a human. Every creature here is built live in your browser.
Dig through time
Era strata
Youngest rock on top. Choose a layer to repaint the sky and wake its signature animal.
Specimens in amber
The herd
Nine animals across three periods. Tap a card to bring it to the stage and flip it for field notes.
Nose to tail
Scale parade
How the stage animal measures up against you, a school bus, and the longest beast in the herd.
Lengths are commonly cited adult estimates; colors are artistic guesses — skin pigment rarely fossilizes. For the sky as it really is tonight, open the Planetarium.