The Tyrant Lizard King, the Tyrannosaurus Rex
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The Tyrant Lizard King, the Tyrannosaurus Rex

While the T-Rex was neither the largest predator nor the largest dinosaur, they are the biggest in popularity. 

Tyrannosaurus Rex also known as T-Rex is one of the most popular and best-known dinosaurs. They are one of the few dinosaurs that most people both know and can easily say their scientific name. They lived from 67 to 66.5 million years ago, and were one of the last non-avian dinosaurs alive. The T-Rex lived in North America, but other members of their family have been found in Africa and Asia.

The Tyrannosaurus Rex was one of the first dinosaurs ever found, and for a long time was thought to be the largest predatory dinosaur in the world. The first partial skeleton was found in 1900 by palaeontologist Barnum Brown. Dr. Brown also found another partial T-Rex skeleton in 1902. Despite Dr. Brown discovering the dinosaur first, he did not give the T-Rex their name; they were named in 1905 by the president of the American Museum of Natural History, Henry Fairfield Osborn. The name “Tyrannosaurus Rex” comes from both Greek and Latin, the first part that is Greek roughly translates to “Tyrant Lizard”, while the last part is Latin translates to “King”. 

Tyrannosaurus Rex would be a fearsome sight today. On average, they stood around 13 feet at the hips, around 40 feet long, and weighed from five to seven tons; they were around the height of a two-story building. While Spinosaurus and Giantosaurus were larger predators, every other prehistoric predator was around the same size or smaller than the T-Rex. Since they were so large, scientists believe they were apex predators and few dinosaurs would be able to harm them. One of the most debated subjects about Tyrannosaurus Rex is how quickly they were able to run. Some scientists theorize that they could sprint up to 18 miles per hour, easily being able to outrun a human. However, other scientists believe that they could only reach speeds of about 11 miles per hour. The one thing scientists agree about is that the T-Rex was still fast enough to catch prey.

Being an apex predator meant that the T-Rex hunted many different dinosaurs. Their most common prey was Hadrosaurids and Ceratopsians. However, they were opportunist hunters and would hunt any dinosaur they could bring down, from wounded and weak sauropods to even other T-Rex. Very few other dinosaurs hunted T-Rex; large predators occasionally hunted young T-Rex such as the Deinoychus, but full-grown T-Rex was only hunted by other larger T-Rex.

The Tyrannosaurus Rex is one of the most well known dinosaurs in the world. Both adults and children love them, and people flocked to museums to see their skeletons. While they were neither the largest predator nor the largest dinosaur, they are the biggest in popularity. 

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