The bones of a new giant dinosaur have been found in Argentina, say experts.
Scientists think the bones were those of a massive plant-eating dino, called Futalognkosaurus dukei, that would have roamed the earth 80 million years ago.
It would have been at least 32m tall - about the height of six giraffes - making it one of the tallest dinosaurs ever found.
Experts think the dino skeleton belongs to the previously unknown species due to the unique structure of its neck.
Experts reckon the dino would have been taller than six giraffes
They said they'd found bones from the dinosaur's neck, back, hips and part of its tail at the site in Patagonia, where lots of other fossilised animals and leaves have also been uncovered.
Dijno researcher Alexander Kellner said: "It's among the biggest dinosaur finds and the most complete for a giant dinosaur.
"Leaves and dinosaurs together is a great rarity. It's like a whole lost world for us."