Teenage Tyrannosaur's Last Meal: Baby Dinosaurs

A 75-million-year-old fossil of a teenage Tyrannosaur, known as Gorgosaurus, has provided the first evidence of a large species of tyrannosaur having well-preserved stomach contents. The fossil revealed that the Gorgosaurus had feasted on two baby dinosaurs, belonging to the species Citipes elegans, before its death. This discovery suggests that tyrannosaurs drastically changed their diet as they grew older, with juveniles hunting small, young dinosaurs while adults attacked and ate large plant-eating dinosaurs. The fossil was first discovered in Canada in 2009 and took several years to prepare for study.