Triceratops vs Tyrannosaurus Rex

A detailed side-by-side comparison of Triceratops and Tyrannosaurus Rex, covering size, diet, classification, geologic period, and discovery history.

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Side-by-Side Comparison

Propriedade	Triceratops	Tyrannosaurus Rex
Nome científico	Triceratops horridus	Tyrannosaurus rex
Classificação	Ceratopsia	Tyrannosauridae
Período	Cretaceous Late	Cretaceous Late
Dieta	Herbivore	Carnivore
Comprimento	9.0 m	12.3 m
Height	3.0 m	3.7 m
Peso	6.8 t	8.4 t
Ano de descoberta	1889	1905
Local de descoberta	Denver, Colorado, USA	Montana, USA
Nomeado por	Othniel Charles Marsh	Henry Fairfield Osborn

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Size Comparison

Triceratops 9.0 m

roughly the length of a large SUV

Tyrannosaurus Rex 12.3 m

about as long as 2 cars end-to-end

Weight Comparison

Triceratops 6.8 t

about the weight of 1.1 elephants

Tyrannosaurus Rex 8.4 t

about the weight of 1.4 elephants

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Timeline Comparison

Triceratops

100,5 Mya Cretaceous Late (Mesozoic) 66,0 Mya

Tyrannosaurus Rex

100,5 Mya Cretaceous Late (Mesozoic) 66,0 Mya

Triceratops and Tyrannosaurus Rex both lived during the Cretaceous Late period and may have shared the same habitats.

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Diet Comparison

Triceratops

Herbivore

Triceratops was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.

Tyrannosaurus Rex

Carnivore

Tyrannosaurus Rex was a meat-eating predator, hunting other animals for food.

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Classification Comparison

Triceratops

Clade: Ornithischia

Group: Ceratopsia

(Horned faces)

Tyrannosaurus Rex

Clade: Theropoda

Group: Tyrannosauridae

(Tyrant lizards)

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Diferenças principais

T. rex was a carnivore; Triceratops was an herbivore that likely served as prey for T. rex.
Triceratops weighed up to 6,800 kg and had three horns plus a bony frill for defense; T. rex weighed up to 8,400 kg with powerful jaws as its primary weapon.
Both lived in the same time and place (Hell Creek Formation, Late Cretaceous North America), making them true contemporaries.
T. rex had binocular vision and a large brain suited for hunting; Triceratops had laterally-placed eyes and a small brain suited for browsing.
Fossil evidence suggests T. rex regularly preyed on or scavenged Triceratops — bite marks are found on Triceratops bones.

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Did You Know?

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Triceratops was a herbivore while Tyrannosaurus Rex was a carnivore.

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Both dinosaurs lived during the Cretaceous Late period and may have coexisted.

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Triceratops was discovered 16 years earlier, in 1889.

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Triceratops belonged to Ceratopsia while Tyrannosaurus Rex belonged to Tyrannosauridae.

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Compare With Other Dinosaurs

Triceratops vs Protoceratops

Herbivore vs Herbivore

Tyrannosaurus Rex vs Allosaurus

Carnivore vs Carnivore

Tyrannosaurus Rex vs Carcharodontosaurus

Carnivore vs Carnivore

Tyrannosaurus Rex vs Giganotosaurus

Carnivore vs Carnivore

Tyrannosaurus Rex vs Spinosaurus

Carnivore vs Piscivore

Tyrannosaurus Rex vs Velociraptor

Carnivore vs Carnivore

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Explore These Dinosaurs

Triceratops

Triceratops horridus

9.0m long, 3.0m tall, 6.8t · Cretaceous Late

Tyrannosaurus Rex

Tyrannosaurus rex

12.3m long, 3.7m tall, 8.4t · Cretaceous Late

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