Fossilized dinosaur feces is 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, seeking some extra protein and calcium to help with egg development.
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