At a Glance Field Information Species Tyrannosaurus rex Period Late Cretaceous (68–66 Ma) Skull length Up to 1.5 m (5 ft) Tooth count 50–60 at any one time Tooth length Up to 20 cm (8 in) including root Estimated bite force ~35,000–57,000 N (strongest of any known land animal) Tooth replacement Continuous throughout life Quick … Read more
At a Glance Field Information Species Tyrannosaurus rex Period Late Cretaceous (68–66 Ma) Adult skin evidence Scaly impressions from neck, pelvis, tail Feathered relatives Yutyrannus huali (confirmed), Dilong paradoxus (confirmed) Juvenile evidence No preserved skin known; feathering possible but unconfirmed Current consensus Adults probably predominantly scaled; full picture unknown Quick Answer: Current fossil evidence — … Read more
At a Glance Field Information Species Tyrannosaurus rex Period Late Cretaceous (68–66 Ma) Arm length ~1 m (3 ft) on a 12–13 m animal Fingers 2 functional clawed digits Estimated curl strength ~180 kg (400 lb) per arm Function Genuinely debated; probably not vestigial Quick Answer: T. rex arms measured approximately 1 metre (3 ft) … Read more
At a Glance Field Information Species Tyrannosaurus rex Period Late Cretaceous (68–66 Ma) Estimated top speed 17–24 km/h (10–15 mph), most current models Movement style Powerful striding walk; true running debated Speed-limiting factor Bone stress at high speeds in an 8,000–14,000 kg body Quick Answer: Biomechanical models suggest adult T. rex moved at a maximum … Read more
At a Glance Field Information Species Tyrannosaurus rex Period Late Cretaceous (68–66 Ma) Adult length 12–13 m (39–43 ft) Hip height ~3.7–4 m (12–13 ft) Adult weight 8,000–14,000 kg (17,600–30,900 lb), est. Heaviest known specimen Scotty (RSM P2523.8), est. ~8,870 kg (19,555 lb) Skull length Up to 1.5 m (5 ft) Quick Answer: Adult Tyrannosaurus … Read more
Did Triceratops Fight Tyrannosaurus rex – What Does the Fossil Evidence Actually Show? Feature Triceratops horridus Tyrannosaurus rex Period Late Cretaceous (68–66 Ma) Late Cretaceous (68–66 Ma) Length 8–9 m (26–30 ft) ~12 m (40 ft) Weight 6–10 metric tons ~8–14 metric tons Diet Herbivore Apex carnivore Key weapon Three horns, solid skull, low centre … Read more
What Were Triceratops Horns and Frill For? The Science Behind the Headgear Field Information Species Triceratops horridus Period Late Cretaceous (68–66 Ma) Brow horn length Up to ~1 metre (fossil core); longer in life with keratin sheath Nasal horn length Shorter and more conical in T. horridus than in T. prorsus Frill width Up to … Read more
Who Discovered Triceratops? The Fossil History of Triceratops horridus Field Information Species Triceratops horridus Period Late Cretaceous (68–66 Ma) First specimen found 1887, Denver Formation, Colorado (George Lyman Cannon) Formally named 1889 by Othniel Charles Marsh Type specimen YPM 1820, Lance Formation, Wyoming Key fossil site Hell Creek Formation, Montana Notable modern specimen “Horridus” — … Read more
What Did Triceratops Eat? Diet, Teeth, and Feeding Behaviour Explained Field Information Species Triceratops horridus Period Late Cretaceous (68–66 Ma) Diet Herbivore — low-growing fibrous vegetation Key feeding adaptations Parrot-like beak, dental batteries of 432–800 teeth, scissor-action shear Confirmed food types Flowering plants (angiosperms), cycads, ferns, palms, conifers Quick Answer: Triceratops was a strict herbivore … Read more
Quick Answer: As of current research, Triceratops and Torosaurus are most likely separate genera, though the debate remains open. A 2010 study proposed that Torosaurus was simply an old Triceratops that had grown large holes in its frill — but subsequent work found evidence of young Torosaurus individuals and major structural differences that are difficult … Read more