Dinosaur family tree -- Meat eaters -- Inside story -- Starting small -- Pack hunters -- Early killers -- Big and fierce -- Fish-eaters -- Fast killers -- Dinosaurs to birds -- Single claws -- Sprinters -- Smart for its age -- Terrible reptiles -- Island hunter -- Long- necked plant eaters -- Inside a giant -- Early biggies -- Bigger and bigger -- Going to extremes -- Unusual necks -- Chinese giants -- Going for height -- Unusual plates -- Plates with ridges -- Small-scale giant -- Unusual teeth -- Vulnerable in life -- Last of the giants -- Armored dinosaurs -- Early armor -- Plate bearers -- Big plate carrier -- Spikes and armor -- Side spikes -- Tail clubber -- Colorful clubs -- Boneheads -- Beginnings of horns -- Strange horns -- Big frills -- The greatest horns -- On the move -- Two-footed plant-eaters -- Early examples -- Iguana-tooth -- Fast runners -- Living in the cold -- Giant of Africa -- Duckbills -- Showy heads -- More duckbills -- Nests and eggs -- Safety in speed -- Safety in numbers -- Death and decay -- Discovery