Troodon formosus was a small coelurosaurian dinosaur—a member of the same clade (evolutionary group) to which modern birds belong. Fossilized remains have been discovered of nesting parents and ...

Troodon (Stenonychosaurus actually ... Initially mischaracterized as an egg thief, fossil evidence later revealed that Oviraptor exhibited advanced parental care, brooding over its eggs similar ...

But what would have happened if it hadn't occurred? In 1982, paleontologist Dale Russell asserted that the evolution of ...