The document provides details about the Tyrannosaurus Rex or T-Rex. It describes the T-Rex's physical appearance as being up to 40 feet tall with short green arms that could not reach its mouth, weighing up to 7 tons with orange eyes and really sharp teeth. It notes that T-Rex's lived around 68 million years ago in hot places like southwest Canada, Asia, and the western US. The document also shares some interesting facts, stating that T-Rex's had 50 teeth, were part of the reptile family, and were the most powerful meat-eaters to ever live.