While visiting the IMAS museum in McAllen, Texas, they have a bearded dragon named Ryujin. It almost gave us a sense how dinosaurs would look like millions of years ago. These lizards probably walked along side the dinosaurs then. This dragon has an impressive sharp spikes around the neck and trunk and armored plates on the extremities. It almost looked like a Medieval time knight. How evolution has organized the symmetry in the scales and spikes is remarkable!