Carnotaurus sastrei, a medium-sized theropod dinosaur of the abelisaurid family, sprints through the jungles of South America during the Late Cretaceous around 70 million years ago. Equipped with thick tail muscles attached to its thigh bone, Carnotaurus may have been one of the fastest non-avian dinosaurs yet discovered, with a top speed clocking between 30 and 35 miles per hour. This would have helped this predator chase down its prey across the prehistoric landscape.