
- Estimated at 14 feet long, 5 ½ feet tall
- Late Cretaceous (75 million years ago)
- Probably plants, possibly insects and other small animals
- 1931 Wyoming
Little is know about the life of this dinosaur because only skulls have been found to date. The thickened dome on the skull is its best known feature. The skull bone was as much as 10 inches thick! Some scientists think they may have head butted the sides of other dinosaurs in self defense or dominance contests.
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