SCENE 8: Mammals and Primates Visual: Land animals evolve different body shapes and features. Action: Some animals grow fur; some grow larger brains and bigger bodies. Action: Over countless generations, some become four-legged mammals, others start to climb trees. SCENE 9: Evolution of Apes Visual: Among these tree-climbers, some look and act more like monkeys and apes. Action: Their bodies and faces change very slowly: bigger brains, eyes that face forward, hands that grip. SCENE 10: Rise of Early Humans Visual: In one group of apes, some stand a little straighter, walk on two feet more often, and use simple tools. Action: Over many generations, these early humans develop larger brains, communicate using sounds, and build simple shelters.