What did extinct dinosaurs eat—and how do we know it? Find out more from Michael J. Novacek, the Museum's provost of science, and Mark A. Norell, chair of the Division of Paleontology, in a video. 

Visit the David H. Koch Dinosaur Wing on the Museum's fourth floor, and you'll find a bevy of fossil dinosaurs, in two separate halls. One is the Hall of Ornithischian Dinosaurs (Or-nuh-THISH-ee-an); the other is the Hall of Saurischian Dinosaurs (Sawr-ISH-ee-an). A video explains the difference.

A video series on amnh.tv delves into the topic of dinosaurs, which arose some 230 million years ago and thrived until most large dinosaurs became extinct about 65 million years ago. Why? In the video series, paleontologists Mark Norell, Michael Novacek, and Lowell Dingus  explain extinction and more. 

A new scientific study shows that duck-billed dinosaurs pulverized tough and abrasive plants with grinding teeth more complex than those of cows, horses, and other well-known modern grazers. The researchers, which included Mark Norell, the chair of the Museum’s Division of Paleontology, are the first to recover material properties from fossilized teeth.

Mark Norell, who is chair of the Museum's Division of Paleontology, works on numerous areas of specimen-based and theoretical research. Learn about Dr. Norell's dinosaur research and fieldwork by watching the video below. 

See additional curator profiles on the “Meet the Scientists” channel on AMNH.tv.