model dinosaur fossil, dinosaurs are a diverse group of reptiles of the clade dinosauria. they first appeared during the triassic

ancient animal appeared archaeological archeology are artifact background bone brown carnivore clade dead dino dinosaur dinosauria dinosaurs diverse evolution excavation extinct extinction first footprint fossil fossilized geology group historical history jurassic life mineral model monster museum nature object old paleontology paw playground predator prehistoric raptor real reliquiae reptile reptiles rock science skeleton skull space spine stone they triassic vertebra