How does a t-rex use energy?

Are the coelacanth older than the dinosaurs? What is the color of hadrosaurus? What are the dragons from How to Train your Dragons dragon manul? What type of prey did the Pterodactyl consume? How did Ichthyosaurus die? What was the largest animal in the Jurassic period? Which dinosaur is found in almost every continent? Where are the pieces for becoming a fire breath dragon in how to raise a dragon? How much does maxus drago cost? What is the full name of the t-rex? How long did dinosaurs dominate the earth? What does dimorphodon mean? What does a t-rexs eat for prey? What kind of dinosaur had head crest? What is a dragon tree used for? What is the purple triceratops code on Free Realms? What is Diamonite? Where was dalmatia? What will a seaweed and hail dragon get you on dargonvale? Which dinosaur was the longest land animal to have ever lived?