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Across 1. A three-horned herbivore 5. Probably actually the first bird, but with some dinosaur-like body parts 6. A North American duck-billed dinosaur (or hadrosaur) 9. A large-eyed, large-brained carnivore 11. One of the armoured dinosaurs - an ankylosaur 13. A small bipedal herbivore found in Spain and England 18. A large sail-backed herbivore found in North Africa 19. A short-frilled, horned dinosaur 20. A long-frilled dinosaur with horns

Down 2. A duck-billed dinosaur with a long, hollow crest on its head 3. A crested, duck-billed dinosaur 4. A carnivore with powerful jaws and a large, sharp claw on each back foot 7. A horned dinosaur with a spiked head frill 8. A fast-running predator 10. The last of the armoured dinosaurs, it was also the largest 12. An early Mongolian horned dinosaur 14. A fast dinosaur that looked like an ostrich 15. A plated dinosaur which may have had an unusual way of controlling its temperature 16. A long-necked, giant dinosaur 17. A large herbivore that lived in many parts of the world