The sauropod dinosaurs, the long-necked, four-legged plant-eaters, were big. Even the smallest species, like Ohmdenosaurus, were at over ten feet long. And the really big ones were… really big.

Possibly the largest was Patagotitan mayorum, a titanosaur that lived 100 million years ago in what is now Argentina. Patagotitan was a part of the sauropod group called “titanosaurs” which includes other giants like Argentinosaurus and Puertasaurus. It reached over 120 feet long and weighed more than 150,000 pounds– as much as 43 mid-size cars! Patagotitan is the largest known animal to live on land. It’s still not the biggest animal ever, though– that honor goes to the blue whale, which weighs almost twice as much as Patagotitan!

Photo by Zissoudisctrucker