Ключевые слова: action, aggression, ancient, animal, anthropology, ape, behavior, bone, breaking, brute, caveman, concept, desert, development, discovery, dramatic, earth, evolution, exploration, force, gesture, hammer, heat, history, impact, instinct, intelligence, learning, mammal, monkey, mountain, nature, outdoors, powerful, prehistoric, primal, primitive, rock, smash, strength, strengthtest, sunrise, sunset, survival, tool, wild, wilderness,