Dinosaurs had long been thought of as overgrown reptiles; cold blooded, swamp bound, with meagre intelligence and little to no social complexity. The ‘Dinosaur Renaissance’ was a revolution in palaeontological thinking that entirely transformed that traditional image of dinosaurs. In Lesson 4, we will see how new research and discoveries over the past fifty years have shaped our modern image of dinosaurs into one of energetic, intelligent animals, that likely displayed many of the complex social behaviours witnessed in modern birds. You’ll also meet the deinonychosaurs, A.K.A. ‘the raptors’, and you will learn the leading theories for how one group of dinosaurs learned to fly.