It was still a teenager, but it had already lived a tough life. Its body was covered with all types of maladies: broken, infected, and deformed bones that testify to the rough-and-tumble world of the Late Jurassic, when even the biggest predators didn’t have an easy time hunting behemoths like Diplodocus and Brontosaurus, when the sharpest teeth and claws were no guarantee of surviving a whack from the spiky tail of a Stegosaurus. The Allosaurus was nicknamed Big Al,
