In academic, historical, and archaeological circles, A. Dates are determined by a variety of processes, including chemical analyses (as in radiocarbon dating and thermoluminescence), data correlation (as in dendrochronology), and a variety of other tests. Acheulean - A stone tool industry, in use from about 1.6 million years ago until 125,000 years ago.
- "Abbreviation for the term Anno Domini Nostri Jesu Christi (or simply Anno Domini) which means ""in the year of our Lord Jesus Christ."" Years are counted from the traditionally recognized year of the birth of Jesus. E.)." Absolute Dating - Collective term for techniques that assign specific dates or date ranges, in calendar years, to artifacts and other archaeological finds.
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).All the sub-disciplines study aspects of past or present humans.Archaeologists generally study the physical and material remains of ancient societies, while cultural anthropologists study living cultures.AMS - Accelerator Mass Spectrometry is an absolute dating technique that measures the amount of carbon-14 in an organic object and provides a rough indication of its age. Anthropology - The study of human beings, including their behavior, biology, linguistics, and social and cultural variations.
In the United States, anthropology is divided into four sub-disciplines: archaeology, biological/physical anthropology, cultural anthropology, and linguistics.Alidade - An optical surveyor's instrument used in the field to create topographic maps and top plans.Today alidades are being replaced by Total Stations.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 some instances, however, running water carries away nutrients from exposed soils and creates areas unsuitable for agriculture.