Titanosaurs, a diverse group of long-necked sauropod dinosaurs, were found on every continent, including Antarctica, in their Cretaceous heyday. They lived right up until the end of all other non-bird dinosaurs, when the Chicxulub asteroid struck the Yucatan Peninsula about 66 million years ago. Paleontologists have discovered dozens of Now paleontologists have announced a species proposed to be most massive dinosaur ever discovered: an enormous herbivore estimated at over 120 feet long and weighing over 70 tons — or longer "However, it is far from being one of the largest and most colossal dinosaurs, such as Patagotitan, Argentinosaurus or Notocolossus, which would have weighed between 70 tons [63.5 metric tons]." If you ever did a school report on dinosaurs, or watched the movie Jurassic Park, then you know the famous long-necked Brontosaurus.. This giant dinosaur roamed the earth during the late Jurassic Period, between 145.5 and 196.6 million years ago, in what is now the western United States. There are actually three species of Brontosaurus dinosaurs of varying sizes. Dinosaur That Vied for 'World's Biggest' Gets Downsized. Paleontologist Ken Lacovara stands next to 22 tail vertebrae from Dreadnoughtus, one of the most massive dinosaurs with a calculable weight Patagotitan is estimated to have been 4 times heavier than Dippy, and 10 times that of the iconic Tyrannosaurus. The heaviest animal to have ever lived on Earth is the Blue Whale weighing in at 200 tons - double the weight of Patagotitan. 6. The titanic dinosaur's name was inspired by Greek mythology. v0dR.

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