Study: Dinosaurs were on their way out before meteorhitCNN(CNN) Dinosaurs were already on a slow decline for at least 50 million years before a massive meteorite smashed into Earth and exterminated them, ...DinosaursCNN.comDinosaurs were already on a slow decline for at least 50 million years before a meteorite smashed into Earth and exterminated them, according to new ...Dinosaurs doomed before