Lesson 10 Ancient Earth | Journey to the Center of the Earth © Start to Finish published by Don Johnston Inc Spinosaurus was probably the only dinosaur that could swim. Its feet may have looked like the feet of a giant duck. When Spinosaurus was on land, it may have walked on four feet. This made Spinosaurus different from T. Rex and other carnivores. Spinosaurus, a Huge Dinosaur You probably know about a dinosaur called T. Rex. But do you know about Spinosaurus? Spinosaurus was even bigger than T. Rex! Spinosaurus and T. Rex both ate meat. An animal that eats meat is called a carnivore. Let’s find out more about Spinosaurus... T. Rex Spinosaurus Fantastic Facts Spinosaurus had a huge head with 38 teeth. It probably ate giant sharks, and fish that were as big as cars.