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 ...

But a new study of the most complete skeleton of the species known to exist has answered many questions about the enigmatic critter — first described in 1883 by famed paleontologist Edward Drinker ...

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