It was very maneuverable and hunted in packs. It also had a mouthful of razor-sharp teeth, a superfast top sprinting speed, was 25 feet long, and was extremely smart. Utahraptor was very lethal, comparable to the raptors in Jurassic Park, with nine to 15-inch claws. It contains a single species, Utahraptor ostrommaysorum, which is the largest known member of the family Dromaeosauridae. Utahraptor is a genus of theropod dinosaurs. It could take down a full-grown Argentinosour! Giganotosaurus was 43 feet long and weighed 13 tons. Giganotosaurus is a genus of theropod dinosaur that lived in what is now Argentina, during the early Cenomanian age of the Late Cretaceous period, approximately 99.6 to 97 million years ago. It had an 18,000-pound-per-square-inch bite that eliminated all of its competitors (including Spinosaurus)! A deadly bacteria in its saliva would utterly terminate helpless prey that somehow survived the initial bite. It was 37-50 feet long, up to 23 feet tall, and weighed 11 tons - twice as heavy as an Asian elephant. Tyrannosaurus Rex was more intelligent, and far more lethal, than any of its competition. Its bite force reached up to 12,800 pounds.
It also had a tremendous bite force, the strongest of any dinosaur and living terrestrial animal. Tyrannosaurus, meaning "tyrant lizard", from the Ancient Greek tyrannos, "tyrant", and sauros, "lizard" is a genus of coelurosaurian theropod dinosaur. Spinosaurus was a fish eater that sometimes ate other meat.
Spinosaurus was the largest of all carnivorous dinosaurs, weighing the same as three buses. Spinosaurus is a genus of theropod dinosaur that lived in what now is North Africa, during the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago. This VOA Special English SCIENCE REPORT was written by Mario Ritter. Tyrannosaurus always will remain a creature of popular action movies and of the imagination. Paleontologists can only know the giant creature from its mineral fossil remains. The last Tyrannosaurus rex died about sixty-five-million years ago. The debate over how fast some dinosaurs ran probably will continue for some time. Many paleontologists continue to believe that the bone structure of Tyrannosaurus shows that it could run fast. Some paleontologists believe the bird-like bones of giant dinosaurs suggest that some of these ancient creatures were fast runners. In the last twenty years, scientists who study ancient bones have linked dinosaurs to birds. Not all scientists agree with the findings of Mr. This idea has passed into popular culture all the way to the directors of Hollywood movies. Until now, scientists believed that the huge dinosaur could run up to seventy kilometers an hour. The findings of the two biological scientists conflict with current scientific information about Tyrannosaurus. He says its leg muscles would have had to be eighty-five percent of its total weight. Hutchinson says the animal's legs would have had to be huge to enable the creature to run fast. The meat-eating dinosaur weighed almost six-thousand kilograms. They found that the legs of Tyrannosaurus were not strong enough for the animal to be able to run fast. Garcia used a biological computer model to study the bones of the ancient creature. They reported their findings in the publication Nature. Their research suggests that Tyrannosaurus rex could only walk slowly. They are John Hutchinson of Stanford University in California and Mariano Garcia of Cornell University in Ithaca, New York.
Yet two biological scientists say this is probably wrong. The Tyrannosaurus in the movies is a terrible combination of speed and power. The huge dinosaur Tyrannosaurus rex has even been in popular American movies like "Jurassic Park." In some movies, Tyrannosaurus rex is shown running at top speed after cars and helicopters. This is the VOA Special English SCIENCE REPORT.Īncient animals called dinosaurs have captured the imagination of millions of people around the world.
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