A thought
One of the basic properties of magnetism is that a magnet always has two poles, north and south, yet we don’t know any theoretical reason why magnetic monopoles; magnets with a single North Pole or South Pole, could not exist.
Brief history
Thales of Miletus, northern Greece reported that a piece of rock from Magnesia, naturally magnetic form of magnetite known as Lodestone, had strange properties. Lodestone could attract iron, bit no other material, even more mysteries, when hung from a piece of string, a piece of lodestone would always orient itself in the same way. He also noticed that amber could attract light objects such as feathers or hair after it had been rubbed; which is now understood as an effect of static electricity. Unlike amber, lodestone did not need rubbing or any other preparation to acquire these properties, but when an iron needle was rubbed with lodestone, these properties were....
