Áth Cliath is the name of a Viking longphort established at least as early as 841 AD at what was to become Dublin, Ireland.
The Aterian is a distinctive stone tool industry of North Africa, dated between 90,000 and 40,000 years ago, and made by anatomically modern humans.
Aztalan is a large Mississippian site located on the west bank of the Crawfish River near Lake Mills in the midwestern US state of Wisconsin.
The Sierra de Atapuerca is an ancient karst topography region of Spain, where several caves are located with evidence of very old occupations.
The tell site of Atchana was an Early to Late Bronze Age trading center in Syria.
The Athabaskans were late prehistoric and historic period peoples of the American southwest, considered ancestral to the Navajo and Apache and other modern groups.
Surely among the most well known of archaeological sites, the ancient capital of the Greek civilization Athens was first occupied during the Neolithic period.
Atlantis is a fictional kingdom described by Plato in two of his dialogues, Timaeus and Critias.
The atlatl is a sophisticated combination hunting tool or weapon, formed out of a short dart with a point socketed into a longer shaft.
The Aurignacian period (40,000 to 28,000 years ago) is an Upper Paleolithic stone tool tradition
Australopithecus is one of several species of hominins who may or may not be Homo sapiens direct ancestor.
The Avar culture is the name given to Slavic nomads living near the Danube River basin from the 6th through 9th centuries AD.
Avebury is an ancient megalithic site, dated to the Late Neolithic period and located in in central south England.
An axe is a stone wood working tool, used as modern day axes are, to cut down trees, horizontally slicing through the wood.
The Axumite civilization is a Coptic pre-Christian state in Ethiopia, from about AD 100-800.
The Aymara are a modern cultural group of the Andes in Peru, and the descendants of the Tiwanaku Empire in the Lake Titicaca region of Bolivia and Peru (400-1500 AD).
Aztalan is a large Mississippian site located near Lake Mills in the state of Wisconsin of the midwestern USA.
The Aztec civilization is the collective name given to seven Chichimec tribes of northern Mexico
