User:Derrick Dempster-Galga/Books/stuffaboutdinosaursandthat

Stuff about dinosaurs and that

 * Sunk costs
 * Tyrannosauridae
 * Gorgosaurus
 * Quetzalcoatlus
 * Pterosaur
 * Tarbosaurus
 * Genus
 * Tyrannosaurus
 * Daspletosaurus