Allosaurus
Mary Evans Picture Library/Deagostini Editore
Allosaurus ('different lizard') is a genus of large carnivorous dinosaur that lived 155 to 145 million years ago in the late Jurassic period. It was a powerful predator with a huge heavy-boned body, a strong neck and legs with a massive tail. It measured about 12 metres long and stood 5 metres tall.