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 ...

a dipolar magnetic field—one with “north” and “south” directionality, like the two ends of a bar magnet—that curves its magnetic field lines around a planet, such as Earth. This curved ...