http://gizmodo.com/5601514/the-triceratops-never-existed-it-was-actually-a-young-version-of-another-dinosaur
Scientists are saying that the Triceratops dinosauryou know, the three horned onewas actually a juvenile form of a Torosaurus, the three horned dinosaur you don't know. Apparently, dinosaurs' skulls can shape-shift. The scientists, John Scannella and Jack Horner, believe that the Torosaurus and Triceratops are actually of the same species. According to the them, as a Triceratops aged, its horns and frill became more similar to that of a Torosaurus. Short becomes long, saw-edged becomes smoothed and so on. Having them be the same species would explain why there were never any young Torosaurus fossils discovered. Scientists sure enjoy crushing my childhood memory of The Land Before Time (they nixed Brontosaurus a while back - totally ruining the Flintstones). http://www.boingboing.net/2010/07/29/when-2-dinosaurs-bec.html