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.

By far the largest and oldest group in the order Lepidoptera, moths are usually overshadowed by their flashier cousins, the butterflies. But they are finally getting their due in Winged Tapestries: Moths at Large, a photo exhibition now open at the Museum.

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.