Fossilized dinosaur feces are challenging some basic assumptions about dinosaur eating habits. Hadrosaurs, a kind of duck-billed dinosaur, are among the most common herbivores of the Cretaceous period ...

Some big plant-eating dinosaurs roaming present-day Utah some 75 million years ago were slurping up crustaceans on the side, a behavior that may have been tied to reproductive activities, says a new ...