Mosasaurus hoffmanni is the biggest Mosasaur fossil ever found. Scientists estimate that it was about 39-42 feet long, but could get up to 57 feet! It weighed 2200 lbs. or more. Its size is comparable to that of the Megalodon, a well-known, giant prehistoric shark believed to have lived about the same time. Argentinosaurus, a titanosaur sauropod dinosaur from the Cretaceous period in Argentina. By the beginning of the Cretaceous period, about 145 million years ago, gigantic, plant-eating dinosaurs like Diplodocus and Brachiosaurus were on the evolutionary decline. However, this didn't mean that sauropods as a whole were destined for early The name , which literally means 'three-horned face', is derived from the ) meaning 'three', ) meaning 'horn', and ) meaning 'face'. is one of the most recognizable of all dinosaurs and the best-known ceratopsian. It was also one of the largest, up to 8-9 metres (26-30 ft) long and 5-9 metric tons (5.5-9.9 short tons) in body mass. That isn't much different from their modern counterparts. Modern elephants weigh 3 to 7 tons (2,722 to 6,350 kg) and range from 5 to 14 feet (1.5 to 4.3 m) tall, according to The Defenders of T. rex had strong thighs and a powerful tail, which counterbalanced its large head (Sue's skull is 5 feet, or 1.5 m, long) and allowed it to move quickly. The 2011 study, which also modeled T. rex A Spinosaurus lived around 90-100 million years ago during the Cretaceous period. Their fossils were first discovered in Egypt by the Bavarian paleontologist Freiherr Ernst Stromer in 1912. It's considered the largest known carnivore ever discovered and could reach lengths of 60 ft., which is the same size as a bowling lane or four cars parked behind each other. A full-grown Tyrannosaurus rex stood about 12 to 13 feet high at the hip, and was about 40 to 43 feet long. Paleontologists have discovered the heaviest and longest-lived T. rex ever seen in the uOwVv.

how much did the biggest dinosaur weigh