W B Formerly there were dinosaurs so dangerous that scientists are still surprised by their ferocity:
Ankylosaurus
Its name means armored lizard. He lived in what is now North America during the Cretaceous period. It measured 5.58 feet in height, 20.5 feet in length and weighed around of six tons. It is recognized by its bony formations covered with collagen and by the enormous mallet that had in its tail. Chances are he used it to deal with his enemies. From the back of the skull two horns raised. In the background it was a quiet animal that used its formidable defenses to dissuade its enemies and to continue eating its plants.
Allosaurus
It lived in what is now the United States and Portugal at the end of the Jurassic period. It measured up to 29.5 feet of length, and 11.5 feet of height; but it did not weigh as much, only 4 850 lbs., just like an Indian rhinoceros. Its skull was also light, but his jaws contained 60 D-shaped teeth. Since he had to deal with gigantic dinosaurs such as Apatosaurus and diplodocus, it most likely used ambushes as a method of hunting and attacking as a group.
Pentacerateps
Don’t those horns look terrifying to you? This dinosaur lived in North America at the end of the Cretaceous. It was 26.2 feet long and 13.1 feet high. It weighed around of 6 tons and it looked terrifying. It had three horns on its head, a strong beak and thorns in the tail. They walked in packs and all his bones served to ram its enemies or decide who was the leader of his group. Being herbivore, it used its beak to pull the ferns from the earth.
Carnotauro
This dinosaur lived at the end of the Cretaceous period in what is now South America. It was 29.5 feet long and weighed more than a ton. Its appearance was terrifying because it had two horns on the top of his skull, hence his name. Paleontologists have determined that he had a formidable sense of smell, that he ran at a great speed and that his hide possessed scales similar to those of a crocodile. It has been determined that it used the horns against members of its own species and that it had small eyes to avoid being damaged in the combats.
Velociraptor
You must have known Velociraptor thanks to Jurassic Park, but the film has some inaccuracies. In the early part of the saga, paleontologists find a velociraptor skeleton in the Montana desert, which is impossible because this animal lived in the deserts of Asia during the Cretaceous period. Their appearance is also different from reality: the velociraptor had his body covered with feathers especially under the forearms, as if they were wings. His name means fast thief, and it was fearsome: it had 28 teeth per jaw, and a claw on his hind legs that he used to nail it into the veins of his victims. At the moment of the killing, it leaned on one end and kicked with the other to stay on his prey. A carnivorous ostrich.
Utahraptor
This relative of the velociraptor was worse than the former. Its name means predator of Utah and lived in what today is that state. It was relatively small, was 23 feet long and weighed 1 102 lbs. However, he had a formidable 10-inche claw and its herd attack was deadly. Scientists have discovered that, just as the Velociraptor, it was covered in feathers, but don’t be fooled: the Utahraptor was a serial killer.
Tyrannosaurus Rex
It is the most famous dinosaur of all and its name means king lizard. He lived in the Cretaceous in what is now North America, was 39.4 feet long, 13 feet high and weighed 6 to 8 tons. Its skull was five feet long, and he had teeth that, from the outside, measured twenty-five inches, but from the root they were thirty centimeters long, making it the dinosaur with the best teeth. Its jaw could exert pressure on his prey from 3 to 5 tons, enough to tear flesh and bone. On the other hand, paleontologists do not know what its true speed was, but they are likely to have reached 34 miles per hour. Despite this, it was only the fourth largest carnivorous dinosaur, the other three come next.
Carcharodontosaurus
This dinosaur lived in what is Africa today during the Cretaceous period. Its name means shark tooth reptile, or sharpened tooth reptile. It measured 43 feet in length and weighed 15 tons. It had a gigantic skull about 6 feet long. Its great teeth ripped through flesh and its hook-shaped front claws served to sustain whatever it wanted to kill. In addition, it was extremely fast, capable of running 20 miles per hour.
Gigantosaurus
This predator lived in what is now Argentina during the Cretaceous period. It measured 39 feet in length and weighed 8 tons. Its skull was five feet long. It was so large that it ate animals the size of a tyrannosaurus. Its front legs had three fingers with large claws. Yet it had a weakness: its size prevented him from running fast. Paleontologists confirmed this by finding that its femur, i.e. the upper leg bone, measured more than its tibia, the lower bone, which made it even heavier. Most likely, it was an ambush predator.
Spinosaurus
If you saw Jurassic Park 3 for sure you must remember this dinosaur. It was the largest carnivore ever known. It measured 40 feet and a half in length and weighed 20 tons. It had a long, narrow skull and small ridges over its eyes. Its main characteristic was the thorns that grew in its back up to 5 feet. There is a whole debate about how it used them; it is believed that they served to intimidate his victims or to regulate their temperature. It spent so much time in the water as on the earth, similar to a crocodile, and its main prey were the dinosaurs that were leaning in to fish.
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