How big was the Argentinosaurus footprints?

Why could some dinosaurs fly? Did dilophosaurus really spit? What group of animals did dinosaurs come from? What do stegosaurus's Breath through? Who is stronger neo dragonoid or neo dragonoid vortex? When did Othniel Marsh name the Triceratops? What was bigger pteranodon or pterodactyl? How often did dinosaurs eat? Are dinosaurs friendly? When is dragon fruit available in Australia? What is pattosium? When was the first triceratops fossil discovered? Where did they find the T rex? Why did dinosaurs become extinct and not any other animals? What is the result when wind dragon and mirror dragon is finish breeding? Were wolves around when dinosaurs were alive? What level do you need to be to get a huge treat farm In DragonVale? What does born a Double Dragon mean? Why does Rex tell his family that he has lost his job? Can you have nitrogen atoms in your bodies that existed during the time of the dinosaurs?