CarnivoreMeaning:"Tyrant Lizard King"
Length12.8m
Height4m
Weight8.8t
Illustrative simulator stats
Attack98/100
Defense84/100
Bite Force12,800 PSI
Mesozoic Encyclopedia & Combat Simulator
Dinosaurs Names: The Definitive Guide to
Prehistoric Dinosaurs.
Explore prehistoric species profiles, compare anatomy and scale, and try illustrative matchups in the battle simulator.
Species Documented
30+
Triassic to CretaceousInteractive Tool
Battle Arena
Illustrative matchupsHeaviest Titan
45.0 Tonnes
Estimated profile valueTop Land Sprint
55 km/h
Estimated profile valueFeatured Clash of the Titans
Tyrannosaurus Rex vs. Spinosaurus
Compare these species in an illustrative matchup using simplified game ratings for bite force, size, and terrain.
T-REX
VS
SPINO
Spotlight Dossier
Read Full Paleontology Dossier →Species of the Day: Brachiosaurus
SauropodHerbivoreLate Jurassic (154 - 150 Million Years Ago)
One of the tallest and most iconic sauropods of the Jurassic. Unlike most other long-necked dinosaurs, its front legs were longer than its hind legs, giving it a majestic giraffe-like posture to browse high Jurassic conifer trees 13 meters above the forest floor.
Primary Weapons & Armor
- 45-tonne kinetic stomp force capable of pulverizing any predator
- Massive tree-trunk front forelimbs with heavy thumb claws
- High-altitude vantage point 13 meters above ground level
- Heavy muscular tail capable of sweeping away medium theropods
Combat Performance Index
Attack Power75/100
Defense Resilience94/100
Locomotion Speed35/100
Bite Compression1,800 PSI
Species Roster
View All 30 Dinosaurs →Iconic Prehistoric Dinosaurs
Geological Epochs
Explore by Mesozoic Time Period
From the emergence of early theropods in the Jurassic to the apex reign of titanosaurs in the Late Cretaceous.
100 - 66 Ma
Late Cretaceous
The golden age of titans including T-Rex, Triceratops, Spinosaurus, and Mosasaurus, ending in the K-Pg extinction event.
Dominant fauna14 Species
145 - 100 MaEarly Cretaceous
Flourishing of diverse feathered theropods, early ceratopsians, and colossal sauropods across changing continents.
Dominant fauna1 Species
163 - 145 MaLate Jurassic
The era of gigantic long-necked sauropods, plated stegosaurs, and swift allosauroid predators.
Dominant fauna5 Species
201 - 174 MaEarly Jurassic
Recovery after Triassic extinction; dinosaurs rapidly diversified to dominate terrestrial niches worldwide.
Dominant fauna2 Species
Your Prehistoric Field Guide
A Guide to Dinosaurs and Prehistoric Life
Browse dinosaurs and other prehistoric animals by name, group, diet, and geological period. Profiles bring together identification, habitat, anatomy, and size information to help readers compare species in context.
Use the directory filters to find a species, then open its profile for more detail. The collection includes dinosaurs as well as pterosaurs, marine reptiles, and prehistoric mammals; these groups are identified separately because they are not all dinosaurs.
Profile measurements and reconstructions are estimates based on incomplete evidence. Treat the battle simulator ratings and matchups as illustrative game values, not scientific measurements or predictions of real encounters.
Dinosaur Questions Answered
Frequently Asked Questions About Dinosaurs
Which dinosaurs can I explore here?
Browse familiar species such as Tyrannosaurus rex, Triceratops, Stegosaurus, Brachiosaurus, Velociraptor, and Spinosaurus, along with other prehistoric animals in the directory.
When did dinosaurs go extinct?
Most non-avian dinosaurs went extinct about 66 million years ago, at the end of the Cretaceous Period. Birds are living dinosaurs, so the dinosaur lineage did not disappear completely.
What killed the dinosaurs?
The leading explanation is the Chicxulub asteroid impact, which caused global environmental disruption, including darkness, cooling, wildfires, and food-web collapse. Volcanic activity and climate change may also have increased the stress on ecosystems.
Were dinosaurs real?
Yes. Dinosaurs are known from fossils including bones, teeth, trackways, nests, eggs, and feathers. Fossil evidence has been found on every continent.
Are the battle simulator results scientific predictions?
No. The simulator is an educational game. Its ratings and outcomes are illustrative comparisons, not measured biological values or evidence of real encounters.