In ancient Greece, a shepherd boy discovered a strange magnetic stone that attracted his iron-tipped stick without touching it, surprising him. He brought it to the philosopher Thales, who tested it and found it only attracted iron, calling it the "magnetic stone" after the city of Magnesia. Thales also found that rubbed amber attracted light objects at a distance, calling this new force "electric force". This was the earliest recognition of "action-at-a-distance" in Western civilization. It was not until the 16th century that physicist William Gilbert began formally studying magnetism and the origin of the terms "electric" and "electricity".