THE STORY OF tyrannosaurs begins with the discovery of T. rex, the namesake of the group, in the early days of the twentieth century. The scientist who studied T. rex was a good friend of President Theodore Roosevelt’s, a boyhood chum who shared Teddy’s love for nature and exploration. His name was Henry Fairfield Osborn, and during the early 1900s, he was one of the most visible scientists in the United States.
