Interview with David Trexler, Cory Coverdell, and Kara Ludwig from the Two Medicine Dinosaur Center in Bynum, Montana. Dinosaurs could see more shades of red than humans can, possibly meaning that they had red feathers or skin, X-ray scans find severe arthritis in a hadrosaur, the largest carnivorous dinosaur footprint ever was found, and more. Also dinosaur of the day Shantungosaurus, one of the largest known ornithischians. Visit http://www.IKnowDino.com for more information including a link to dinosaur sites near you. You can also visit https://www.patreon.com/iknowdino to get the inside scoop on I Know Dino