How feathered creatures that blur the boundaries between dinosaurs and birds are revolutionising scientists' understanding of life on Earth. Focusing on China, where most of these discoveries are made, the programme features animals such as the epidexipteryx, a predator the size of a pigeon and the most bird-like of any dinosaur, and the eight-metre-long gigantoraptor, revealing their feathers may have been developed for insulation, to intimidate or attract, or even for flight