Tyrannosaurus Rex or T-Rex was one of the largest land carnivores of all time. They lived throughout what is now western North America, on what was then an island continent known as Laramidia. Fossils date back 66 to 68 million years ago. The T-Rex is one of the best-known dinosaurs featured in films, books, and other entertainment media. Now featured on our Surfing T-Rex, Structured Trucker Hat, Jurassic Blue.