T. rex cousin's stomach reveals dismembered young dinosaurs

Fossilized remains of a juvenile Gorgosaurus, a cousin of the T. rex, have been discovered in Canada's Alberta province, revealing its last meals. The 5 to 7-year-old Gorgosaurus had preyed on turkey-sized yearlings of a feathered plant-eating dinosaur called Citipes. This is the first tyrannosaur skeleton with preserved prey items inside its stomach, providing insight into the changing feeding strategies and diets of tyrannosaurs during their lifespan. The study suggests that young tyrannosaurs occupied different ecological niches as "mesopredators" while adults were apex predators, indicating they did not compete for the same prey.