According to a live science, article written by Mary Bagley, "The Cretaceous period was the last and longest segment of the Mesozoic era. It lasted about 79 million years, from the minor extinction event that closed the Jurassic period about 145.5 million years ago to the Cretaceous-Paleogene extinction event dated about 145.5 million years ago. 65.5 million years” (Mary Bagley, LS). During the Cretaceous period, the continent of Pangea was still standing out on its own, forming what we today call the seven continents of the world. In the many eras of dinosaurs, the Cretaceous era was responsible for the evolution of some, but not all, dinosaurs, from terrestrial dinosaurs to some semi-aquatic carnivorous dinosaurs capable of living both on land and in the ocean. water. According to Live Science, an article written by Joseph Castro, "Spinosaurus means 'spine lizard,' an apt descriptor because the dinosaur had very long spines growing on its back to form what is known as a veil ". the spines, which grew from the animal's posterior vertebrae, were up to 2.1 meters long and were probably connected to each other by the skin" (Joseph Castro, LS). Spinosaurus was the largest of all carnivorous dinosaurs They were about fifty feet long and twenty feet tall, that's bigger than the tyrannosaurs-rexes They probably weighed eighteen thousand pounds (DinoInfo). Spinosaurus is bigger than the famous T-rex But how much bigger was Spinosaurus than T-rex, or even a human? This size chart should give you a better idea of ​​how big it was compared to? its predecessor, the T-rex As you can see, in the size chart it shows the size comparisons between a human and the Tyrannosaurus Rex. As mentioned earlier, the Spinosaurus was an amphibious dinosaur. swimming and catching prey in water or on land, this is where Spinosaurus had the overall survival advantage over T-rex. Additionally, one of the most notable features of Spinosaurus was its gigantic, spike-like sail that protruded from its spin. What was the point sail used for? Well, there are three theories. According to Bob Strauss, in an article he wrote, the sail could have been used to impress the female spinosaur during mating season. The larger the sail, the more attractive it appeared to the female spinosaur and was able to mate and reproduce. Additionally, it could have been used to regulate core body temperature during cold nights. And the last theory suggests that