The biggest of these meat-eaters currently known is the spinosaurus, which lived in and around North Africa millions of years before the first tyrannosaurus existed. Tyrannosaurus rex grew to about 45 feet long. Spinosaurus was up to 60 feet long! That's about two school buses in length!
So, the tyrannosaur wasn't the biggest or meanest. Dinosaurs probably weren't really mean, though. They just needed to eat to stay healthy. Some animals eat plants, and others eat other animals. Some animals, like people, eat both!
Tyrannosaurus Rex and Spinosaurus were separated in time by millions of years. They never met each other. They were also separated geographically as well! Take a look at a map and see if you can find the territories for each of the animals.
Spinosaurus lived in and around North Africa.
Tyrannosaurus Rex lived in Canada, the United States, and Asia.
Sources & links
"tyrannosaur." Encyclopædia Britannica. 2010. Encyclopædia Britannica Online. 30 Apr. 2010 Viegas, Jennifer. "Tyrannosaurus: One of the Biggest Flesh-Eating Predators of All Time." Discovery Dinosaur Central. 30 Apr. 2010. Viegas, Jennifer. "Spinosaurus: World's Largest Carnivorous Dinosaur." Discovery Dinosaur Central. 30 Apr. 2010. World Continent Map. MapsofWorld.com 30 Apr. 2010.