Scientists have revealed details about the remains of a massive meat-eating dinosaur discovered in Argentina. The bones of the two-legged beast, called Mapusaurus roseae, suggest it was more than 12m long and could have been bigger than the mighty T. Rex. The word mapusaurus means earth, and the roseae refers to the rose-coloured rock the fossils were found in. Fossil experts think the Mapusaurus might have hunted in packs, as the discovery included a cluster of bones from at least seven of the beasts.
It had been thought that dinosaurs were too ferocious to hunt together. It's not known whether the animals worked together during the hunt, or just gathered around to eat the animal once it was killed. The Mapusaurus bones are thought to date back 1 million years, and were dug up in Argentina in 1997-2001. Experts say it's difficult to know exactly how long the biggest specimen was because no complete skeleton was found.
But scientists say the new discovery was almost certainly a similar size to the Tyrannosaurus Rex, Gigantosaurus and Spinosaurus. But they are not sure exactly which size order the monsters came in.
And if you want to know more about dinosaurs then have a look at the BBC Newsround guide to dinosaurs or if you’d like to play some dino games then click here
Three amazing dinosaur facts:
- Dinosaurs lived about 230 million years ago
- There were more than 700 different types of dinosaur
- The word dinosaur means "terrible lizard" in Greek
What do you call a blind dinosaur?
Do-you-think-he-saurus.
When do dinosaurs eat you?
Chewsday.
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