Magnetic phenomena were known to the ancient Greeks since about the 9th century BC. They noticed that a kind of stone (what is presently known as magnetite: Fe3O4) attracts pieces of iron. The word magnetic derives from Magnesia, the name of a Greek region where magnetite was found. And they also knew that a piece of amber, the Greek name of which is ήλεκτρον (electron), when rubbed could attract such things as straw and feather. In the same way that sometimes a comb gets electrified when run though somebody’s hair and then can attract small pieces of paper. But not much was done in the way of investigating these phenomena.