In the summer of 1990, the first nearly complete Tyrannosaurus rex skeleton ever found was excavated in the Montana badlands under the supervision of one of the world's leading dinosaur paleontologists, Dr. John Horner. That same year a second, even more complete, skeleton was found in South Dakota. Together these skeletons are yielding surprising new insights into the most famous of the dinosaurs. We know more today than ever before about the anatomy and behavior of T. rex, and about the world in which it lived. Among the surprising discoveries explained in this book are T. rex was a far sleeker carnivore than previously thought, perhaps weighing less than 6 1/2 tons, no more than a bull elephant; T. rex's principal habitat was forest, not swamp or plain; T. rex may have been warm blooded, and it may be that its body temperature cooled as it matured; T. rex's arms were shorter than previously thought, but even more powerful; and there appear to have been two forms of T. rex, perhaps male and female. The Complete T. rex is beautifully illustrated with reproductions of paintings by leading dinosaur artists, and photographs, including Dr. Horner's excavation and restoration of a T. rex skeleton. Written by a celebrated dinosaur scientist, this is the most complete and important account ever of the life and times of the king of dinosaurs.