everybody knows Stegosaurus, Why wouldn´t you? it´s amongest one of the most Famous Dinosaurs of all time alongside T-rex and Tricreatops, this Jurassic Plant eater at 6.5 Meters long and about 5.3 to 7 metric tons is well knowen for it´s Row Of Plates running Down it´s Back whice are Used to warn off Predators like allosaurus by color, much like How snakes use thier colros to warn off predators, in edition it´s also Knowen for it´s Spikey Tail called a thagomizer, a Word that comes from the Far Side Comic´s by Gary Larson and these are used as a defensive measure against predators in case the Plate´s won´t a good warning,

in fact there Is an Allosaurus that Died from a Hit to the Crotch by one of these tail Spikes, OUCH.