Prehistoric Animals Dinosaurs Mammals Marine Reptiles Avian Reptiles Prehistoric Sharks Time of the Dinosaurs Triassic Period Jurassic Period Cretaceous Period Dinosaur Biology This category relates to Dinosaur Anatomy, such as their key physical features and functionality. Some theories are presented regarding the relationships of modern birds and dinosaurs, and whether the dinosaurs were Cold-Blooded or Warm-Blooded. Choose from the topics below to learn more about these amazing prehistoric animals Dinosaur Communication Origin and Evolution of Dinosaurs Dinosaur Size Were Dinosaurs Warm-Blooded? Feathered Dinosaurs and Birds

Dinosaur Extinction Theories Asteroid Impact Egg Predation Climate Changes Volcanic Eruptions Disease Did you know? The most complete of Allosaurus remains was discovered in 1883 by a fossil collector, M.P. Felch, at Canyon City, Colorado. Paleo Artists Visit our Paleo gallery where you will find great dinosaur illustrations among other prehistoric creatures which are now extinct. These artists are professionals and have created great depictions of what these prehistoric creatures may have looked like.