Using CT scans, researchers discovered a malignant bone cancer in the fibula of a horned dinosaur that lived 75 million years ago. Photo by Royal Ontario Museum/McMaster University =========================================================================== Aug. 4 (UPI) -- For the first time, scientists have diagnosed a dinosaur with osteosarcoma, an aggressive, malignant bone cancer, according to a study published in The Lancet Oncology. The tumor was found on the fibula, or lower leg bone, of a Centrosaurus apertus specimen, a plant-eating, horned dinosaur that lived 75 million years ago. Shortly after its original discovery in Dinosaur Provincial Park in Alberta in 1989, paleontologists misdiagnosed the...