The document provides an overview of prehistory, beginning with a definition and description of the fields that study this period such as geology, paleontology, anthropology, archaeology, and ethnography. It then discusses early humans including Australopithecus, Homo habilis, Homo erectus, Neanderthals, and Homo sapiens. Finally, it covers some key developments like the earliest cave art and paintings, architecture, language, writing systems including cuneiform, Egyptian hieroglyphs, hieratic and demotic scripts, and the importance of the Rosetta Stone in deciphering hieroglyphs.