thumb|Poulnabrone dolmen, [[the Burren, County Clare, Ireland]] thumb|Dolmens in Amudalavalasa|Amadalavalasa, [[Andhra Pradesh, India]]
A dolmen is an ancient stone structure made of large upright stones supporting a flat stone on top, examples of which can be found in places like Ireland and India. These prehistoric monuments are significant because they provide evidence of early human societies and their burial or ritual practices across different regions of the world.
AI-generated from the Wikipedia summary — may contain errors.
thumb|Poulnabrone dolmen, [[the Burren, County Clare, Ireland]] thumb|Dolmens in Amudalavalasa|Amadalavalasa, [[Andhra Pradesh, India]]
A dolmen (), or portal tomb, is a type of single-chamber megalithic tomb, usually consisting of two or more upright megaliths supporting a large flat horizontal capstone or "table". Most date from the Late Neolithic period (40003000 BCE) and were sometimes covered with earth or smaller stones to form a tumulus (burial mound). Small pad-stones may be wedged between the cap and supporting stones to achieve a level appearance. In many instances, the covering has eroded away, leaving only the stone "skeleton".
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).