33a. A Second Look at the First T. rex, 1906
In 1906, Osborn wrote a second article on Tyrannosaurus rex, to accompany the announcement of the previous year. He did so because bones of a second specimen had been discovered at Hell Creek in the summer of 1905. That specimen had originally been identified as a separate genus, Dynamosaurus. Osborn now admitted that was an error, for the second specimen was generically identical to Tyrannosaurus. The additional bones made possible a more accurate restoration, which was provided by L. M. Sterling under Osborn’s direction. The most striking disocovery depicted in the restoration is a complete set of belly ribs.
Sterling’s restoration, at 1/40 scale, is quite a bit larger than Matthew’s restoration of 1905.
Osborn, Henry Fairfield. "Tyrannosaurus, upper Cretaceous carnivorous dinosaur (second communication)," in: Bulletin of the American Museum of Natural History, vol. 22 (1906), pp. 281-296. This work is part of our History of Science Collection, but it was NOT included in the original exhibition.