Allosaurus fragilis, tooth with root & serrations Pachycephalosaurus This odd shape may have

This odd shape may have been used as a hydrofoil allowing it to swim against the current

or spherical shape

This is because the shale layers that the fossils are found in are made up of about 40% water and 8% oil

which suggests that it is a significant transitional form

Allosaurus maxilla with erupting teeth 12" $90 Scientific name: Allosaurus fragilis Location: Wyoming

Allosaurus fragilis, tooth with root & serrations Pachycephalosaurus This odd shape may haveAllosaurus (pronounced Al oh SAWR us) Allosaurus, meaning "different lizard," was a huge, meat eating dinosaur from the late Jurassic period, about 154 million to 144 million years ago. It was a theropod that lived in what is now the western United States. It was up to 40 feet long and weighed up to 4. 5 tons. The skull was nearly 3 feet long and filled with dozens of serrated razor sharp teeth. It was about 10 feet tall at the hip and had 3 clawed