This site looks at four great dinosaurs:

Barosaurus
Triceratops
Corythosaurus
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 Humans
Fossils                           :          What they are, and how they're formed
Extinction                  :          Looks at the Dinosaur's disappearance
Dino Facts                     :        Checks out Statistics on our four dinosaurs