This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are ...

Scientists measured a chorus wave emerging from an unexpected place, and confirmed a key piece of a theory about how these ...

Earth's main magnetic field is generated in the planet's outer core, a layer of molten iron 2,2001,800-3,100 miles ... complex than that of a regular bar magnet, the magnetic south pole ...