For the first time, paleontologists have discovered a fossilized tyrannosaur with its last meal preserved in its stomach—and it turns out the dinosaur was a fussy eater, consuming only the choicest parts of its prey and discarding the rest. 

The discovery confirms what researchers have long suspected: Juvenile tyrannosaurs, like this one, sliced through the flesh of small prey with blade-like teeth, while adults, with chompers strong enough to crush bone, targeted giant herbivores.