OSAKA They were the biggest of the big. With their long necks and tails, the sauropod subgroup of dinosaurs comprised the largest animals ever to roam on land, scientists say. Many grew to more than 20 meters in length and weighed over 10 tons. A few years ago, paleontologists discovered the fossil of a beast that was an estimated 40 meters long and weighed around 80 tons.
Dinosaur fossils help solve a big mystery
Paleontologists trace sauropods' staggering size to unique, fast-growing bones