Baby sauropods were the fast food of the Late Jurassic, feeding multiple predators and propping up the entire ecosystem. Their vulnerability may even explain why later giants like T. rex evolved to ...

An early ancestor of large, long-necked, four-legged dinosaurs like Brachiosaurus and Diplodocus was a quick, nimble biped that probably used its forelimbs to grasp its food, which included leaves, ...