A tyrannosaur tooth embedded in a hadrosaur skull

An extraordinary fossil find provides fresh evidence about dinosaur behavior and predator-prey interactions.Plus hadrosaurs breaking their tails while mating, a diplodocoid with a broken tail tip, and many more paleopathologies.For links to every news story, all of the details we shared about Koparion, and our fun fact check out https://iknowdino.com/Koparion-Episode-565/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Koparion, a small troodontid we only know from a tooth.In dinosaur news this week:There’s a new herrerasaur, Ptychotherates bucculentusHadrosaurs may have injured their tails while matingA Barosaurus with a long whip-like tail had a fracture at the tip of its tailA tyrannosaur lost the tip of its tooth in the skull of an EdmontosaurusA Plateosaurus with a bone infection in its right arm is the oldest known dinosaur bone infectionCancer has been around for millions of years, including in dinosaursA few titanosaurs were found with cysts in their tailsA mamenchisaurid sauropod had a tumor on its shoulder and arm Tell us what you think about our show in our 2026 IKD Survey! We want our show to be as enjoyable as possible, and your input will help us improve. Head to iknowdino.com/survey to help shape the future of I Know Dino!See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.