How did T-rex's mate?

Who discovered megalosaurus? Did ankylosaurus live alone or in groups? Was a frozen intact dinosaur found? When did the spineosaurus die? How was the land 200 million years ago? What is the meaning of rex for a dinosaur? Are euoplocephalus dinosaurs meat eaters? How big was brachiosaurus? What is it like to live with dinosaurs? Which dinosaur was fast and had a hollow tail? What evidence supports the common ancestry of dinosaurs? Why does daphne's father turn daphne into a laural tree? What time period did triceratops dinosaurs live? Is petroleum made of dinosaur bones? How did t-rex look like? Are there dinosaurs in the world? What unit of geologic time followed the mass extinction of dinosaurs? Was there Primates during the times of the dinosaurs? What is brachiosaurus weight? What are the three characteristics of naming a dinosaur?