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. But new research suggests that actually, these animals also chowed down on crustaceans. The prehistoric snacking was likely intentional and linked to mating behaviors.
The scientists found tell-tale crustacean shell pieces in samples of fossilized dinosaur feces about 75 million year old from the Grand Staircase-Escalante National Monument in southern Utah.