LEIDEN, NETHERLANDS - OCTOBER 17: A display of the Deinonychus antirrhopus, a genus of carnivorous dromaeosaurid coelurosaurian dinosaurs and the Tenontosaurus, a genus of ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period and contains two species, Tenontosaurus tilletti and Tenontosaurus dossi are pictured before Trix, the female T-Rex exhibition at the Naturalis or Natural History Museum of Leiden on October 17, 2016 in Leiden, Netherlands. The skeleton of Tyrannosaurus rex was excavated in 2013 in Montana, USA, by Naturalis Biodiversity Center. The fossil is part of the Naturalis collection and is more than 80% of the bone volume present. All essential and highvolume bones are in place. This places Trix in the top 3 ranking of the most complete Tyrannosaurus rex skeletons in the world. In addition, all the bones are extremely well preserved. The quality of this fossil is unmatched by any other large T-Rex find in the world. (Photo by Dean Mouhtaropoulos/Getty Images)