This site looks at four great dinosaurs:

Barosaurus
Triceratops
Corythisaurus  
Tyrannosaurus Rex

Other pages to explore on this site are:

             The ancient world       :                       Includes a timeline of the different dinosaur periods
              Us Lot                         :                       Looks at Early Human
              Fossils                        :                       What they are, and how they're formed
              Extinction                   :                        Looks at the Dinosaur's disappearance
              Dino facts                   :                        Checks out Statistics on four dinosaurs