Last Day of the Dinosaurs is a 2010 Discovery Channel television documentary about the extinction of the dinosaurs. It portrays the Alvarez hypothesis as the cause of extinction.The dinosaur models created for Clash of the Dinosaurs were reused for this program. The Parasaurolophus model was used for Charonosaurus even though the legs of Charonosaurus were shorter than those of Parasaurolophus. The Deinonychus model was used for Saurornithoides (rather inaccurately, as Saurornithoides was slenderer than Deinonychus), and the Sauroposeidon model was used for Alamosaurus (even though Alamosaurus had different proportions than Sauroposeidon). The same Tyrannosaurus, Triceratops, Ankylosaurus, and Quetzalcoatlus models were also used. These models were placed upon different backdrops most of the time than those used in Clash of the Dinosaurs.
