Buried or Open? Ancient Eggshells Reveal Dinosaur Nesting Behaviors

The fragile remains of 150-million-year-old eggshells are helping researchers figure out what kinds of nests dinosaurs created for their eggs, according to a new study. A comprehensive look at 29 types of dinosaur eggs suggests that most dinosaurs buried their eggs in nests covered with dirt and vegetation, a tactic also used by modern-day crocodiles. But some small theropods (mostly meat-eating, bipedal dinosaurs) that were closely related to birds used another strategy: They laid their eggs in