According to Science Views, no one knows for sure what caused the end of the Jurassic period, but they do know that several species started to die out, which gave rise to the Cretaceous period. Scientists do not believe that the transition from the Jurassic period to the Cretaceous period was as violent as the transition that took place at the start of the Jurassic period.
Science Views says that the Jurassic period started after a large extinction at the end of the Triassic period. Scientists believe that the start of the Jurassic period was caused by the splitting of Pangaea, which was what the continents were called before they split up into different landmasses. The splitting of Pangaea caused massive earthquakes and volcanic eruptions, which gave way to a large extinction. No such global event took place during the transition between the Jurassic period and the Triassic period.
The end of the Jurassic period is marked by what scientists call “The Great Extinction.” Many theories exist as to how this extinction took place, but some evidence suggests that it was due to plant decay. The creatures that survived during this transition included bugs that fed on dead organisms and mammals that fed on insects.Learn More
The fossilized remains of Sue the T. rex were found near Faith, S.D., during the summer of 1990. As of 2014, Sue is considered to be the largest and most complete skeleton of Tyrannosaurus rex ever found. Sue measures 40.5 feet and weighs over 3,900 pounds.Full Answer >
The prehistoric piranha is called the megapiranha. It weighs in at between 20 and 25 pounds and has a length of 5 feet, which is at least 10 times the size of its descendants. The megapiranha lived in the late Miocene epoch, nearly 10 million years ago, in the rivers of South America.Full Answer >
The Tyrannosaurus rex, like other dinosaurs and their surviving modern-day bird relatives, reproduced sexually. The female then laid fertilized eggs from which newborn tyrannosaurs would hatch.Full Answer >
Based on fossil record, the dinosaur known as Spinosaurus and the prehistoric clade of marine mammals known as pliosaurs are the most apt top contenders for the title of "largest carnivore known to man." The Spinosaurus is the largest known carnivorous dinosaur, with fossil records indicating that this dinosaur could reach lengths of 50 feet and weigh more than 20 tons, but evidence of potential pliosaur size is inconclusive due to incomplete fossilized specimens. A partially fictionalized 1999 documentary from the BBC posited that there may have been pliosaurs that weighed more than 150 tons and were more than 82 feet long, but there is no fossil evidence to support this idea.Full Answer >