This document defines key terms related to prehistoric humans and early civilizations, including: - The Paleolithic and Neolithic Ages, which refer to the Old and New Stone Ages. - Hominids, which are modern humans or early human relatives and ancestors. - The Stone Age, when people made tools mainly from stone. - Nomads, people without a permanent home who moved in search of resources. - Domesticating plants and animals for human use. - Irrigation, supplying land with water through canals. - Surplus, having more of a product than needed. - Artisans, skilled workers like jewelers or potters. - Civilization, societies