When you think of dinosaurs, do you think of ferocious meat-eaters terrorizing everything around them? If so, you were probably imagining the Tyrannosaurus Rex, the 'tyrant lizard' of its time. But if you think you know everything there is to know about T. Rex, think again! Learn about the many sides of this mighty dinosaur. Additional features to enhance comprehension include informative sidebars, a glossary of key words and phrases, sources for further research, a Did-You-Know section, and an overview of the geologic time scale.