Dinosaur Eggs | American Museum of Natural History
Paleontologists presumed that the fossil eggs at Flaming Cliffs were laid by Protoceratops because it was the most common dinosaur at the locality where the eggs were found. However in the 1990s Museum expeditions discovered identical eggs, one of which contained the embryo of an Oviraptor, like dinosaur—which changed scientists' view of which dinosaur laid these eggs.
