Bronze Age
Bronze Age cultures differed in their development of the first writing. According to archaeological evidence, cultures in Mesopotamia (cuneiform script) and Egypt (hieroglyphs) developed the earliest viable writing systems.
The overall period is characterized by widespread use of bronze, though the place and time of the introduction and development of bronze technology were not universally synchronous. Human-made tin bronze technology requires set production techniques. Tin must be mined (mainly as the tin ore cassiterite) and smelted separately, then added to molten copper to make bronze alloy. The Bronze Age was a time of extensive use of metals and of developing trade networks (See "Tin sources and trade in ancient times"). A 2013 report suggests that the earliest tin-alloy bronze dates to the mid-5th millennium BC in a Vinča culture site in Pločnik (Serbia), although this culture is not conventionally considered part of the Bronze Age. The dating of the foil has been disputed.
Prehistoric art
Engraved shells created by homo erectus dating as far back as 500,000 years ago have been found, although experts disagree on whether these engravings can be properly classified as ‘art’. From the Upper Palaeolithic through to the Mesolithic, cave paintings and portable art such as figurines and beads predominated, with decorative figured workings also seen on some utilitarian objects. In the Neolithic evidence of early pottery appeared, as did sculpture and the construction of megaliths. Early rock art also first appeared during this period. The advent of metalworking in the Bronze Age brought additional media available for use in making art, an increase in stylistic diversity, and the creation of objects that did not have any obvious function other than art. It also saw the development in some areas of artisans, a class of people specializing in the production of art, as well as early writing systems. By the Iron Age, civilizations with writing had arisen from Ancient Egypt to Ancient China.