How big was the Argentinosaurus footprints?

What are t rex adaptations it has? What is the possessive form of Brontosaurus? How do you build a dragon library in DragonVale? Is a dilophosaurus poisonous? What did extinction of dinosaurs lead to? Is vastatosaurus rex real? What type of eater is the velociraptor herbavor or carnavor? Which tree was orgin dates back to the jurassic era and the dinosaurs? Where can you find pictures of Regigas? What is the setting of Charlie Bone and the beast? What are all the examples of personification of bulldozers? How much is a dinosaur egg worth that was found in the US? How many stegosaurus were there during the Jurassic period? Was the pterodactyl a herbavor? What takes 20 hours to incubate in DragonVale? How many people would have to been alive 200 years ago to make just you? Ichthyosaurs and plesiosaurs are what? What was the significance of the discovery of dinosaur eggs? How long did a triceratops live for? What are 3 pieces of evidence that supports why dinosaurs became extinct due to a comet?