Troodon is considered to be the smartest dinosaur. It is one species of Dinosaur that is nocturnal. This dinosaur from the Cretaceous may have been ab omnivore, eating both plants and meat such as eggs and insects. There two types of Troodon, one that lives in the North Pole and other in the south. They lived in Western North America during the Cretaceous. Most notable of the Troodon is Mr.Conductor, Mrs.Conductor, Gilbert, the Station Master and Travis.