The document discusses different prehistoric ages including the Paleolithic, Mesolithic, Neolithic, and Chalcolithic ages. During the Paleolithic age, humans hunted collectively using weapons made of stone, bone, wood, and wore clothes made of hide and bark. In the Mesolithic age, small stone tools with sharp points were used. The Neolithic age saw the development of polished stone tools. Finally, the Chalcolithic age was a transition period where in addition to stone tools, early humans began making copper tools as well, marking the shift to the metal age.