Model Dinosaur Fossil, Dinosaurs Are A Diverse Group Of Reptiles Of The Clade Dinosauria. They First Appeared During The Triassic Period, Between 243 And 233.23 Million Years Ago

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ancient animal archaeological background bone bones brown clade dig dinosaur dinosauria dinosaurs diverse evolution excavation extinct extinction foot footprint fossil fossilized fossils geology group history human jurassic life lizard mineral model monster museum nature object old one paleontology paw playground predator prehistoric print raptor real reptile reptiles rock sand science skeleton skull space stone track