When Tyrannosaurus rex was named by Henry Osborn in 1905, it was described alongside a second gigantic theropod, the armour-plated, Ceratosaurus-like Dynamosaurus imperiosus….

Among the most fascinating of Mesozoic theropods are the alvarezsaurids, a mostly small-bodied group of maniraptoran coelurosaurs characterized by modified, ‘pick-like’ forelimbs, a lightly built, shallow lower jaw, tiny, simple teeth and elongate, slender hindlimbs…