A group of researchers has discovered the fossil of Thanatosdrakon amaru, the largest pterosaur species ever found, in the Andes Mountains in Argentina. Called the Dragon of Death, this species was as tall as a giraffe and had a wingspan of around 30ft. Researchers found that the rocks that preserved the remains of the creature date back to the Cretaceous period, which means the flying reptile lived alongside dinosaurs. The pterosaur is believed to be one of the first predators to use its wings to hunt prey.