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(Homo habilis) Skull
Ichthyostega (Greek: "fish roof") is an early genus of tetrapodomorphs that lived at the end of the Late Devonian Period
800 foot thick layer of claystone
a 17 meters (56 feet) long Megalodon would have a mass of about 65 tons
lobsters and insects with external skeletons
Dimetrodon, track Iguanodon (Homo habilis) SkullDimetrodon track Dimetrodon (meaning two measure teeth) was a sail backed, meat eating animal that lived during the Permian Period, roughly 280 MYA years ago, before the dinosaurs evolved. It was a so called mammal like reptile, a pelycosaur; pelycosaurs were the ancestors of the mammals. Dimetrodon was a dominant carnivore during the Permian period, living mainly in swampy areas. Unlike their fellow non finned pelycosaurs, they warmed up early after
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