‘Dinosaurs Among Us’ at American Museum of Natural History, Selected by Mark Dion

This cast is of a remarkable fossil of an oviraptorid dinosaur, Citipati osmolskae, positioned over the center of its nest with forearms spread to protect its eggs. Today, many birds assume this same position when brooding their eggs. This fossil was discovered by Museum scientists in Mongolia’s Gobi Desert.

©AMNH/D. FINNIN