Stegosaurus (the name means "plate lizard") was one of the strangest looking dinosaurs. This 15-foot-long (4.5 meter) stegosaur was also one of the "smaller" Jurassic dinosaurs, only weighing about 3 tons. The plates on its back provided temperature control. The steggy turned its back plates towards the sun to warm its blood, or put them in the shade to cool it. Today, elephants regulate their temperature in the same way by pumping blood into their big ears.