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Artifact - A portable object manufactured, modified, or used by humans. Years are counted back from the traditionally recognized year of Christ's birth. In antiquity, chert was one of the universally preferred materials for making stone tools (obsidian was another).
Assemblage - A group of artifacts found within the same archaeological context (locus, matrix, stratum). In academic, historical, and archaeological circles, this term is now generally replaced by Before Common Era (B. Chipped stone tool - Stone tool made by striking a stone (core or preform) with another stone (hammerstone) or other hard material (such as antler).
In some instances, however, running water carries away nutrients from exposed soils and creates areas unsuitable for agriculture.
In the United States, anthropology is divided into four sub-disciplines: archaeology, biological/physical anthropology, cultural anthropology, and linguistics.
Physical anthropologists study human skeletons and other bodily remains.
Biological anthropologists deal primarily with the evolution of humans and primates. "Present" is academically defined as the year 1950 (the year when this term was invented).
It is generally a raised area above the rest of the city where the most important sacred and secular buildings are brought together.
The buildings on the Athenian Acropolis were important for trade and worship.