Allosaurus was the biggest meat eater in the Jurassic period. Allosaurus lived about 154 to a 144 million years ago. Allosaurus fossils where found in North America. Allosaurus walked on two muscular legs. Allosaurus had a S shaped neck and he was a powerful predator.
Allosaurus eats other animals.
The Archaeopteryx Archaeopteryx means ancient wing. It was a very early prehistoric bird dating from about 150 million years ago during the Jurassic period when many dinosaurs lived. Archaeopteryx was a bird, but it couldn't fly very fast and well. It had teeth and three claws on each leg. Bird fossils are rare because bird bones are hollow and fragile, and usually deteriorate instead of fossilizing.