- Name meaning: dawn three horned face
- average length: 7-8.7 m( 23-28 ft )
- maximum length: 9-10.2 m ( 30-36 ft )
- average weight: 6-10.2 tons
- maximum weight: 12-14.5 tons
- average height: 3-3.3 m ( 9-10 ft)
- maximum height: 4-4.3 m ( 13-14 ft)
- time period: 70.9-65 mya
- habitat: north America
- horn length: 100-110 cm ( 45-50 in )
- bite force: 11500 psi
- Skull length: 2.45-2.87 m ( 8-9 ft )