Meant to get to this yesterday but forgot: new research seems to indicate the back plates on Stegosaurs were not protective, but purely decorative. Same thing with Anklysaurs and Ceratopsians. It's amazing how far our knowledge of dinosaurs has come in the past thirty years. One of my most cherished childhood books was about dinosaurs, and that piece of 70s memorabilia was dominated by the "cold blooded, slow moving, stupid, swamp dweller" mindset that had held sway for the previous century.

Let's hope the next 30 years are just as productive!