Barnum Brown had one ambition as a child: to grow up to be a great dinosaur hunter. And that's just what he did when he was hired by the American Natural History Museum-working to build their astounding collection.

Barnum had a knack for finding dinosaur bones, a skill that rivaled the paleontologists before him. His most amazing discovery was uncovering the largest carnivore that ever walked the earth: the "tyrant lizard king," Tyrannosaurus Rex!