Ключевые слова: ancient, animal, archeology, autumn, biology, bones, brown, detail, dimetrodon, dinosaur, discovery, earth, environment, evolution, exhibit, extinct, fossil, geology, gray, ground, history, landscape, leaves, museum, nature, orange, outdoors, paleontologists, period, permian, predator, prehistoric, reptile, research, rocks, science, skeleton, textures, time, trap, wilderness, wildlife,