Largest period in prehistory, antecesors learnt to do fire, began making utensils, and expressed themselves artistically. were hunters and gatheres, used bifaces to dig and cut or scrape skins. discovery of fire 1. 5 million years ago allowed to light caves make weapons, protect themselves from animals and cold, made meat smoother to bite so jaws could get smaller and their brain get bigger, ived in small groups which was useful for hunting , learning to do tasks, caring for children and the weak.