tyrannosaur: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Photos and Videos

Sue, a dinosaur fossil (Tyrannosaurus rex)

Illustration of a Tyrannosaurus, a massive late Cretaceous predator with a large head, powerful jaws, and serrated teeth, shown alongside a car and people for scale comparison.

Tyrannosaurus rex

tyrannosaur forelimb

skeleton of Tyrannosaurus rex

Illustration of Dilong paradoxus, a small, feathered early Cretaceous dinosaur with a long tail, slender limbs, and a pointed snout, shown in a running pose.

Person in inflatable T. rex costume lifting small dumbbells in a gym beside a weight rack; text overlay reads “design flaw?” with an arrow pointing to the T. rex's arms.

See All Videos and Images →

Topics

Tyrannosaurus Dilong Albertosaurus Raptorex kriegsteini Tyrannosaurus rex How tall was T. rex?Cretaceous Period Late Jurassic Epoch apex predator coelurosaur

Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters

Animal Group Names

Mute swan with cygnet. (birds)

Match the Baby Animal to Its Mama Quiz

Young chimpanzee dressed in a shirt and sweater vest, scratching his head thinking. (primates)

Wild Words from the Animal Kingdom Vocabulary Quiz

Lion (panthera leo)

Deadliest Animals Quiz

The bearded vulture (Gypaetus barbatus) is seen in Switzerland on December 2024

Animal Factoids