Linguists study languages, especially their development and their function within human culture. Back dirt - The excavated, discarded material (sediment, dirt) from a site that has generally been sifted for artifacts and is presumed to be of no further archaeological significance.
Agora - An open-air place of congregation in an ancient Greek city, generally the public square or marketplace, that served as a political, civic, religious, and commercial center.
Many ancient peoples, such as the Egyptians living along the Nile, depended on annual floods and alluvial deposits to replenish the soils they were farming.
Alluvial soils are usually nutrient-rich and good for agriculture.
In the New World the term refers to a period when permanent settlements were becoming more common and human groups were making the transition from hunting-and-gathering to agriculture. Bronze Age - A prehistoric period in the Old World, dating roughly from 3000-1000 B. E, defined by the widespread use of bronze as a material for tools, weapons, and ornaments. The lids were usually modeled to represent animal-headed gods or the heads of important people.
In evolutionary biology, an "archaic" Homo sapien is a hominin (or hominid) who was slightly more primitive than modern humans (Homo sapiens). Bulb of percussion - A small, rounded protrusion on a flake resulting from the blow that separated the flake from its core or another flake. Carbon dating - see Radiocarbon Dating Cardinal Directions - Collective term for the four primary directions: North, South, East, West.