When the Peabody's Great Hall of Dinosaurs opened in 1931, it was a state of the art exhibit, reflecting years of meticulously mounted fossils, and information for visitors based on the most current research on dinosaurs. Derek Briggs, director of the Peabody Museum, said that in the 80 years since its opening, scientists know a lot more about dinosaurs. "For example," he said, "the giant Saurapod, known as Apatosaurus, is depicted in a very static way [in the exhibit]. The notion at the time was it perhaps couldn't even hold up its weight. We now know this was a very active animal that lived in groups, and could move like a modern elephant."