The document discusses the pre-historic period of human existence from around 2 million years ago until the beginning of written records. It describes how early humans evolved traits like bipedalism and made stone tools for hunting and gathering food. Archaeological excavations have uncovered fossils and artifacts that have provided insights into pre-historic life. Key developments included the emergence of Homo sapiens in Africa around 160,000 years ago and the origins of agriculture around 10,000 years ago which marked the transition to the Neolithic period. The document outlines the various sources and methods used to study pre-historic humans.