Killer Cancer in the Cretaceous

Giant predatory dinosaurs were killers without equal, but they stood at the mercy of at least one foe: their own imperfect bodies. On October 23, a team of paleontologists and pathologists announced that they had discovered a massive, possibly lethal brain tumor in the fossilized skull of a Gorgosaurus, a 25-foot-long relative of Tyrannosaurus rex that lived 72 million years ago.